연립방정식의 활용(2-3) by 박연아

연립방정식의 활용(2-3) by 박연아 https://padlet.com/yuna7933/snhsczfou4ntw2g 학번 이름을 먼저 적으세요 en-us 2021-06-01 06:44:56 UTC 2023-05-09 04:03:56 UTC hello@padlet.com yuna7933 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441803 승희는 학교 미술 수업 준비물로 색연필 2자루와 도화지 10장을 구입하고 3400원을 지불하였다. 색연필 1자루가 도화지 1장보다 500원 더 비싸다고 할 때, 색연필 1자루와 도화지 1장의 가격을 각각 구하시오.]]> 2021-06-01 06:44:56 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441803 yuna7933 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441806 영훈이는 친구와 함께 농구 경기를 하였는데, 2점 슛과 3점 슛을 합하여 모두 14골을 넣어 32점을 얻었다. 영훈이가 2점 슛과 3점 슛을 각각 몇 골씩 넣었는지 구하시오.]]> 2021-06-01 06:44:56 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441806 yuna7933 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441807 어떤 두 자리 자연수에서 각 자리의 수의 합은 9이고, 십의 자리의 숫자와 일의 자리의 숫자를 서로 바꾼 수는 처음 수보다 27만큼 크다. 이때 처음 수를 구하시오.]]> 2021-06-01 06:44:56 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441807 yuna7933 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441810 자율 주행 자동차를 시험하기 위하여 출발지로부터 50km 떨어진 지점까지 자동차로 이동하였다. 처음에는 시속 40km로 달리다가 남은 거리는 시속 60km로 달렸더니 총 1시간이 걸렸다. 이때 자율 주행 자동차가 시속 40km로 달린 거리와 시속 60km로 달린 거리를 각각 구하고, 그 풀이 과정을 쓰시오]]> 2021-06-01 06:44:56 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1575441810 20330 장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577994482 2x+10y=3400
x=y+500
2x+10y=3400
2x-2y=1000
12y=2400
y=200
x=700]]> 2021-06-02 00:47:37 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577994482 20314 송민혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577995273 2021-06-02 00:47:57 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577995273 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577995701 색연필 1자루를 x원, 도화지 1장을 y원이라고 함
2x+10y=3400
x=y+500
2(y+500)+10y=3400
2y+1000+10y=3400
12y=2400
y=200
x=700]]> 2021-06-02 00:48:07 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577995701 20324이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577996069 2X+10Y=3400
x=y+500
2y+1000=3400
12y=2400
y=200
x=700

]]> 2021-06-02 00:48:16 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577996069 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577996598 2x+10y=3400
x=y+500
2x+10y=3400
2x-2y=1000
12y=2400
y=200
x=700

]]> 2021-06-02 00:48:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577996598 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577998000 x+y=9
10x+y+27=10y+x
9x-9y=-27
9x+9y=81
18y=54
y=3
x=6]]> 2021-06-02 00:49:04 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577998000 20311남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577998431 2x+10y=3400
x+500=y
x-y=-500
2x-2y=-1000
12y=4400
y=200
x=700]]> 2021-06-02 00:49:14 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577998431 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577998967 2x+10y=3400
x=y+500
2(y+500)+10y=3400
2y+1000+10y+3400
12y=2400
y=200,x=700]]> 2021-06-02 00:49:28 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577998967 20329 장준원 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577999082 2x+10y=3400
X=500+y
2x+10y=3400
-2X + 2y =-1000
12y=2400
Y=200
X=700

]]> 2021-06-02 00:49:31 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577999082 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577999798 처음수 10x+y
x+y=9
10y+x= 10x+y+27
-9x+9y=27
x=9-y
-9(9-y)+9y=27
-81+9y+9y=27
18y=108
y=6
x=3
처음수는 36]]> 2021-06-02 00:49:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577999798 20314 송민혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577999978 처음수=(10x+y),바꾼수=(10y+x)
각자리숫자합 9->x+y=9
10y+x=(10x+y)+27
{x+y=9
{10y+x=(10x+y)+27
x+y=9
9y-9x=27
9약분
x+y=9
-x+y=3
더하면 2y=12 y=6 x=3
따라서 처음수는 36]]> 2021-06-02 00:49:54 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1577999978 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578000154 x+y=9
10y+x=10x+y+27
x+y=9
-x+y=3
2x=6
x=3
y=6
36

]]> 2021-06-02 00:49:59 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578000154 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578001861 2 x + 10 y = 3400
x = y + 500]]> 2021-06-02 00:50:42 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578001861 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578004170 2x+10y=3400
x=y+500
12y=2400
y=200
x=700]]> 2021-06-02 00:51:40 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578004170 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578004190 x+y=14
2x+3y=32
2x+2y=28
y=4
x=10]]> 2021-06-02 00:51:40 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578004190 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578004537 2x+10y=3400
x=y+500
2x+10y=3400
-2x=2y+1000
8y=2400

]]> 2021-06-02 00:51:49 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578004537 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578005024 2점 슛 x개 3점 슛 y개
x+y=14
2x+3y+32
2x+2y=28
y=4
x=10
2점 슛 10개 3점 슛 4개 ]]> 2021-06-02 00:52:01 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578005024 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578005075 x+y=9
10x+y+27=10y+x
9x-9y=-27
9x+9y=81
18y=54
y=3
x=6]]> 2021-06-02 00:52:02 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578005075 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578006711 2 x + 10 y = 3400
x = y + 500

]]> 2021-06-02 00:52:43 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578006711 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578007329 x+y=9
10x+y+27=x+10y
9x-9y=-27
9x+9y=81
18x=54
x=3
y=6
처음 수=36]]> 2021-06-02 00:52:58 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578007329 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578007742 시속 40km로 달린 거리 x
시속 60km로 달린 거리 y
x+y=50
x/40+y/60=1
6x+4y=240
6x+6y=300
-2y=-60
y=30
x=20
시속 40km로 달린 거리: 20km
시속 60km로 달린 거리: 30km ]]> 2021-06-02 00:53:07 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578007742 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578007747 x+y=9
10x+y+27=10y+x
9x-9y=-27
x=6
y=3
36]]> 2021-06-02 00:53:08 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578007747 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578008218 x+y=50
x/40+y/60=1
3x+2y=120
2x+2y=100
x=20
y=30]]> 2021-06-02 00:53:19 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578008218 20324이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578010178 x+y=9
10x+y+27=x+10y
18y=54
y=3
x=6]]> 2021-06-02 00:54:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578010178 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578010434 x+y=9
10x+y+27=10y+x
9x-9y=-27
9x+9y=81
18y=54
y=3 x=6]]> 2021-06-02 00:54:10 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578010434 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578010711 x+y=14
2x+3y=32
2x+2y=28
2x+3y=32
-y=-4
y=4 x=10
2점 10골
3점 4골]]> 2021-06-02 00:54:17 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578010711 20320 윤서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578011305 2021-06-02 00:54:30 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578011305 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578012426 x+y=9
10x+y+27=10y+x
9x-9y=-27
x=-9+y
9(-9+y)+y=27
-81+9y+9y=27
18y=27+81
y=6,x=3]]> 2021-06-02 00:54:54 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578012426 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578013082 x+y=14
2x+3y+32
2x+2y=28
y=4
x=10 ]]> 2021-06-02 00:55:09 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578013082 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578013470 x+y=14
2x+3y=32
2x+2y=28
-y=-4
y=4
x=10
2점슛:10개 3점슛:4개]]> 2021-06-02 00:55:17 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578013470 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578014205 2x+10y=3400
x-y=500
2x-2y=1000
2x+10y=3400
-12y=-2400
y=200
x=700]]> 2021-06-02 00:55:34 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578014205 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578014405 x+y=50
x/40 + y/60=1
3x+2y=120
2x+2y=100
x=20 y=30]]> 2021-06-02 00:55:39 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578014405 20324이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578016015 x+y=14
2x+3y=32
y=4
x=10]]> 2021-06-02 00:56:15 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578016015 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578016998 x+y=50
x/40+y/60=1
3x+3y=150
3x+2y=120
y=30 x=20
40km 20
60km 30]]> 2021-06-02 00:56:38 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578016998 20324이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578018023 x+y=50
x/40+y/60=1
3x+2y=120
2x+2y=100
x=20
y=30]]> 2021-06-02 00:57:03 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578018023 20317 안소현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578018222 2x+10y=3400
x=y+500
2(y+500)+10y=3400
2y+1000+10y=3400
12y=2400
y=200 x=700]]> 2021-06-02 00:57:07 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578018222 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578018611 2x+10y=3400
x=y+500
(아래의 식에 2를 곱하면)
2x+10y=3400
2x-2y=1000
(두 식을 빼면)
12y=2400
y=200 x=700

]]> 2021-06-02 00:57:16 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578018611 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578019244 x+y=14
2x+3y=32
2x+2y=28
-2x-3y=-32
-y=-4
y=4
x=10

]]> 2021-06-02 00:57:32 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578019244 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578019892 x + y = 9
10 x + y + 27 = 10 y + x
9 x - 9 y = - 27
9 x + 9 y = 81
18 y = 54
y = 3
x = 6]]> 2021-06-02 00:57:47 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578019892 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578020018 x+y=14
2x+3y+32
2x+2y=28
y=4
x=10 ]]> 2021-06-02 00:57:49 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578020018 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578020667 x+y=50
x/40+y/60=1
3x+2y=120
2x+2y=100
x=20
y=30]]> 2021-06-02 00:58:06 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578020667 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578021424 x+y=50
x/40+y/60=1
3x+2y=120
2x+2y=100
x=20
y=30]]> 2021-06-02 00:58:26 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578021424 20314 송민혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578025218

]]> 2021-06-02 00:59:58 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578025218 20317 안소현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578025887 x+y=9
10x+y+27=10y+x
9x-9y=-27
9x+9y=81
18x=54
x=3 y=6

36]]> 2021-06-02 01:00:13 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578025887 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578029681 x+y=50
x/40+y/60=1
3x+2y=120
-3x-3y =-150
-y=-30
y=30
x=20]]> 2021-06-02 01:01:42 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578029681 20302 곽준태 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578029799 2021-06-02 01:01:45 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578029799 20310남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578031100 x+y=9
x+10y=10x+y+27
(식을 정리하면)
x+y=9
-9x+9y=27
(아래의 식을 9로 나누면)
x+y=9
-x+y=3
(두 식을 더하면)
2y=12
y=6 x=3]]> 2021-06-02 01:02:16 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578031100 20314 송민혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578033009 2021-06-02 01:03:01 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578033009 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578033990 x + y = 14
2 x + 3 y + 32
2 x + 2 y = 28
y = 4
x = 10]]> 2021-06-02 01:03:23 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578033990 20320 윤서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578034945 x+y=9
10x+y+27=10y+x
9(x+y)=9(9)
9x-9y=-27
9x+9y=81
9x-9y=-27
18y=54
y=3
x=6]]> 2021-06-02 01:03:46 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578034945 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578037027 x+y=14
2x+3y=32
2x+2y=28
-2x+3y=32
-y=-4
y=4
x=10]]> 2021-06-02 01:04:38 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578037027 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578038777 2x+10y=3400
x-y=500
2x-2y=1000
-12y=2400
y=200
x=700]]> 2021-06-02 01:05:22 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578038777 20310남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578039231 x+y=14
2x+3y=23
(위의 식에 2를 곱하면)
2x+2y=28
2x+3y=23
(두 식을 빼면)
y=4 x=10]]> 2021-06-02 01:05:34 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578039231 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578042606 x + y = 50
x / 40 + y / 60 = 1
3 x + 2 y = 120
2 x + 2 y = 100
x = 20
y = 30]]> 2021-06-02 01:06:54 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578042606 20309김진민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578043216 2x+10y=3400
x=y+500
2x-2y=-1000
12y=2400
x=700
y=200]]> 2021-06-02 01:07:08 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578043216 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578045313 x+y=50
x/40+y/60=1
3x+2y=120
2x+2y=100
x=20
y=30]]> 2021-06-02 01:08:00 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578045313 20332 황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578050238 2x+10y=3400
x=y+500
x+5y=1700
- x-y=500
6y=1200
y=200
x=200+500
x=700 x=700,y=200]]> 2021-06-02 01:09:59 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578050238 20310남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578058460 x+y=50
x/40+y/60=1
(아래 식에 120을 곱하면)
x+y=50
3x+2y=120
(위의 식에 2를 곱하면)
2x+2y=100
3x+2y=120
(두 식을 빼면)
-x=-20
x=20 y=30
답=1시간]]> 2021-06-02 01:13:38 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578058460 20332 황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578082940 x+y=9
10y+x=10x+y+27
-9x+9y=27
-x+y=3
x+y=9
+ -x+y=3
2y=12
y=6
x+6=9
x=3 x=3,y=6 36]]> 2021-06-02 01:23:30 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578082940 20332 황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578316940 x+y=14
2x+3y=32
2x+2y=28
- 2x+3y=32
y=4
x+4=14
x=10 10골,4골]]> 2021-06-02 03:01:36 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578316940 20332 황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578334828 x+y=50
x/40+y/60=1
2x+2y=100
- 3x+2y=120
x=20
20+y=50
y=30 x=20,y=30 ]]> 2021-06-02 03:10:10 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1578334828 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1581136903 2021-06-03 01:07:30 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1581136903 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600465813 장미의 개수를 x개, 카네이션의 개수를 y개라고 한다.
장미와 카네이션 수의 합은 22송이이므로 x+y=22
완성된 가격이 꽃바구니와 꽃들의 가격의 합인 14800원이므로
500x+ 700y+ 2000=14800
두 식을 연립하면
x+y=22
500x+700y+2000=14800
x+y=22
500x+700y=12800
500x+500y=11000
500x+700y=12800
연립하면 -200y=-1800
y=9, x= 13이다.
따라서 바구니 속의 장미 수는 13개, 카네이션 수는 9개이다.

장미와 카네이션 수가 각각 13개, 9개이므로 합하면 22송이이다. 또한 장미는 500원, 카네이션은 700원이므로 바구니까지 합하면
500 x 13+ 700 x 9 + 2000
=6500+6300+2000=14800원이므로 문제에 맞는다. ]]> 2021-06-11 06:06:15 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600465813 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600465984 x=장미의 가격
y=카네이션의 가격
x+y=22
5x+7y+20=148
5x+5y=110
5x+7y+ 20=148
-2y=-18
y=9
x=13
9+13=22]]> 2021-06-11 06:06:22 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600465984 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466022 장미:X 카네이션:Y
500X+700Y=12800
X+Y=22

500X+700Y+=12800
500X+500Y=11000
200y=1800 2Y=18
Y=9 X=13
장미는 13송이
카네이션은 9송이다

]]> 2021-06-11 06:06:24 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466022 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466182 장미:x 카네이션:y
x+y=22
500x+700y=14800-2000
500x+700y=12800
500x+500y=11000
200y=1800
y=9,x=13

장미의 개수=13송이
카네이션의 개수=9

13+9=22
500x13+700x9+2000=14800

]]> 2021-06-11 06:06:31 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466182 20325 이제서 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466237 2021-06-11 06:06:33 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466237 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466279 장미:x 카네이션y:
x+y=22
500x+700y=12800
5x+7y=128
5x+5y=110
-2y=-18
y=9
x=13
9 곱하기 700 + 13 곱하기 500
6300+6500+2000=
14800

]]> 2021-06-11 06:06:34 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466279 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466288 장미 x 카네이션 y
x+y=22
500x+700y+2000=14800
5x+7y=128

x=22-y
5(22-y)+7y=128
110-5y+7y=128
2y=18
y=9

x+9=22
x=13

13+9=22
500x13+700x9+2000=14800

]]> 2021-06-11 06:06:35 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466288 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466345 2x+10y=3400
x=y+500
12y=2400
y=200
x=400]]> 2021-06-11 06:06:37 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600466345 20320 윤서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467129 장미:x
키네이션:y
x+y=22
500x+700y+2000=14800

x+y=22
500x+700y=12800

500x+500y=11000
500x+700y=12800

500x+500y-(500x+700y)
=11000-12800
200y=1800
y=9
x=13
x+y=22
500x+700y=12800
9+13=22
500X13+700X9=12800

]]> 2021-06-11 06:07:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467129 20332 황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467152 장미:x,카네이션:y
x+y=22 .......x5..ㄱ
500x+700y+2000=14800
5x+7y+20=148
5x+7y=128 .......ㄴ
ㄱ-ㄴ-> y=9,x=13 이다.
따라서 x+y=22 -> 13송이+9송이=22송이 이고 500x+700y+2000=14800 ->
6500+6300+2000=14800 이다.
그러므로 이문제는 맞다.]]> 2021-06-11 06:07:06 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467152 20303 권윤재 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467190 2X+10Y=3400
x=y+500
2y+1000=3400
12y=2400
y=200 x=700]]> 2021-06-11 06:07:08 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467190 20329 장준원 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467226 X+Y=22
500x+700y+2000=14800

500x+700y=12800
-500x-500y=-11000

200Y=1800
X=13
Y=9

검산은 어떡게 하는지 몰라연

]]> 2021-06-11 06:07:10 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467226 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467232 x+y=22
700x+500y=12800
700x+700y=15400
-(700x+500y)=-12800
200y=2600
y=13
x=9
x=카네이션 개수
y=장미개수
700x+500y=12800에서 x와y가 각각 9,13이라면 방정식은
6300+6500=12800으로 맞고,반대로 x+y=22라는 방정식에서 미지수가 각각 9,13일때 방정식은
9+13=22로맞는다.
따라서 검산해보면 x,y는 각각9,13이맞다.

]]> 2021-06-11 06:07:10 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467232 20331 최우경 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467247 2x+10y=3400
x=y+500
2(y+500)+10y=3400
2y+1000+10y+3400
12y=2400
y=200,x=700]]> 2021-06-11 06:07:11 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467247 20302곽준태 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467356 2021-06-11 06:07:16 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467356 20331 최우경 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467894 처음수=(10x+y),바꾼수=(10y+x)
각자리숫자합 9->x+y=9
10y+x=(10x+y)+27
{x+y=9
{10y+x=(10x+y)+27
x+y=9
9y-9x=27
9약분
x+y=9
-x+y=3
더하면 2y=12 y=6 x=3
따라서 처음수는 36]]> 2021-06-11 06:07:37 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600467894 20302곽준태 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600468272 2021-06-11 06:07:53 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600468272 20331 최우경 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600468432 x+y=14
2x+3y=23
(위의 식에 2를 곱하면)
2x+2y=28
2x+3y=23
(두 식을 빼면)
y=4 x=10

]]> 2021-06-11 06:08:00 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600468432 20331 최우경 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600468905 x+y=50
x/40+y/60=1
3x+2y=120
-3x-3y =-150
-y=-30
y=30
x=20

]]> 2021-06-11 06:08:20 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600468905 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600469170 20308김준석]]> 2021-06-11 06:08:32 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600469170 20309김진민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600469485 2021-06-11 06:08:44 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600469485 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600469607 자연수xy
x+y=9 yx=10x+y=27
9y-9x=27
x+y=9
y-x=3
2y=12 y=6 x=3
36]]> 2021-06-11 06:08:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600469607 20311남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600470548 x+y=9
10x+y+27=10y+x
9x-9y=27
x+y=9
-x+y=3
2y=12
y=6
x=3
처음 수=36]]> 2021-06-11 06:09:27 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600470548 20325 이제서 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600472384 장미의 개수x
카네이션 개수y
X+Y=22
500X+700Y+2000=14800
500X+700Y+2000=12800
-200Y=-1800
Y=9 X=13

]]> 2021-06-11 06:10:41 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600472384 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600473288 2점슛=x, 3점슛=y
x+y=14
2x+3y=32
2x+2y=28
2x+3y=32
-y=-4
y=4 x=10
10,4]]> 2021-06-11 06:11:18 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600473288 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600474545 장미 : x 카네이션 : y
x + y = 22
500 x + 700 y = 14800
5 x + 7 ]]> 2021-06-11 06:12:07 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600474545 20324 이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600474968 장미의 개수를 x 카네이션의 개수를 y라고 두면
x+y=22
500x+700y=14800
5x+7y=148
5x+5y=110
2y

]]> 2021-06-11 06:12:24 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600474968 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600476412 x+y=14
2x+3y=32
2x+2y=28
y=4
x=10]]> 2021-06-11 06:13:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600476412 20312박준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600477112 2021-06-11 06:14:01 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600477112 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600477633 장미=x 카네이션=y
x+y=22
500x+700y=12800
5x+7y=128
5x+5y=110
2y=18
x=13 y=9
13송이]]> 2021-06-11 06:14:26 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600477633 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600478654 x+y=50
x/40+y/60=1
3x+2y=120
2x+2y=100
x=20
y=30]]> 2021-06-11 06:15:16 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600478654 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600480756 500x+700y+2000=14800
500x+700y=12800
x+y=22
5x+7y=128
5x+5y=110
2y=18
y=9
x=13]]> 2021-06-11 06:16:48 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600480756 20324 이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600486373 장미를 x 카네이션을 y라고 두면
x+y=22
500x+700y+2000=14800
500x+700y+=12800
500x+500y=11000
200y=1800
y=900
x=13
장미의 개수 13개 카네이션의 개수 13개이다
검산 해보면
9+13=22 로 첫번째 식의 해가 되고
6500+6300+2000=14800으로 두 식 모두의 해가 된다]]> 2021-06-11 06:20:32 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600486373 20315신한선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600486564 장미꽃 한송이:x 카네이션 한송이:y

X+y=22

500x+700y+2000=14800,

5x+7y=128

5x+5y=110

2y=28

Y=14

X+14=22

X=8

]]> 2021-06-11 06:20:41 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600486564 20331 최우경 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600487381 x+y=22
700x+500y=12800
700x+700y=15400
-(700x+500y)=-12800
200y=2600
y=13
x=9
x=카네이션 개수
y=장미개수
700x+500y=12800에서 x와y가 각각 9,13이라면 방정식은
6300+6500=12800으로 맞고,반대로 x+y=22라는 방정식에서 미지수가 각각 9,13일때 방정식은
9+13=22로맞는다.
따라서 검산하면x,y는 각각9,13이다]]> 2021-06-11 06:21:21 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600487381 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600487615 장미의 개수를 x개, 카네이션 개수를 y개 라고하면
X+Y=22
500X+700Y=14800-2000
식을 정리하면
X+Y=22
500X+700Y=12800
아래의 식에 100을 곱한다
X+Y=22
5X+7Y=128
위의 식에 5를 곱한다
5X+5Y=110
5X+7Y=128
2y=18
Y=9 X=13
두 식에 이것을 대입하면
9+13=22
500 곱하기 13+700곱하기 9 =14800

]]> 2021-06-11 06:21:33 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600487615 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600488984 2021-06-11 06:22:35 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600488984 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600490550 장미 x 카네이션 y
x + y = 22
500 x + 700 y + 2000 = 14800
500 x + 700 y + 2000 = 12800
- 200 y = - 1800
y = 9 x = 13]]> 2021-06-11 06:23:47 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600490550 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600493497 x+y=50
x/40+x/60=1
3x=2y=120 2x+2y=100 x=20
20+y=50 y=30
x=20 y=30]]> 2021-06-11 06:26:09 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1600493497 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606789863 2021-06-15 05:13:35 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606789863 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606794863 업로드 안 됨]]> 2021-06-15 05:16:39 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606794863 20310남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606801418 2021-06-15 05:21:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606801418 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606801756 2021-06-15 05:21:34 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606801756 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606801821 20306 김아현]]> 2021-06-15 05:21:35 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606801821 20310남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606805192 2021-06-15 05:24:06 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606805192 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606805651 2021-06-15 05:24:22 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606805651 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606810211 2021-06-15 05:27:24 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606810211 20310남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606812549 2021-06-15 05:28:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606812549 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606812755 2021-06-15 05:28:54 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606812755 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606815542 2021-06-15 05:31:01 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606815542 20324 이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606815701 2021-06-15 05:31:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606815701 20319오인택 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606818878 2021-06-15 05:33:19 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1606818878 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608710956 x=연필y=볼펜
100x+250y=1450
x+y=10
2x+5y=29
2x+2y=20
3y=9
y=3
x=7
7자루]]> 2021-06-16 00:12:25 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608710956 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608711553 공 모양 초콜릿을 x개, 별 모양 초콜릿을 y개라고 한다.
x+y=16
13+5x+3y=75
x+y=16
5x+3y=62
3x+3y=48
5x+3y=62
-2x=-14
x=7, y=9
따라서 별 모양 초콜릿은 9개. ]]> 2021-06-16 00:12:47 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608711553 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712115 x+y=10
100x+250y=1450
100x+100y=1000
-100x-250y=-1450
-150y=-450
y=3
x=7]]> 2021-06-16 00:13:08 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712115 20316 심수민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712334 2021-06-16 00:13:17 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712334 20302 곽준태 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712353 2021-06-16 00:13:18 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712353 20320 윤서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712468 2021-06-16 00:13:22 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712468 20324 이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712610 한자루에 100원하는 연필을 x 250원하는 연필을 y라고 하자
x+y=10
100x+250y=1450
100x+250y=1450
100x+100y=1000
150y=450
y=3
x=7
7자루]]> 2021-06-16 00:13:27 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712610 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712647 연필:x 볼펜:y
100x+250y=1450
x+y=10
100x+100y=1000
150y=450
y=3
x=7
7자루

]]> 2021-06-16 00:13:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712647 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712694 x=공 y=별
x+y=16
5x+3Y+13=75
3x+3y=48
5x+3y=62
x=7,y=9
별은 9]]> 2021-06-16 00:13:31 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608712694 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608713340 x+y=10 x연필의 가격
100x+250Y=1450 y 볼펜의 가격
100x+100y=1000
-150y=-450
y=3
x=7]]> 2021-06-16 00:13:52 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608713340 20316심수민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714106 x=연필 y=볼펜
x+y=10
100x+250y=1450

100x+100y=1000
-100x+250y=1450
-150y=-450
y=3
x=7 답: 7(자루)

]]> 2021-06-16 00:14:19 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714106 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714305 x=연필
y=볼펜

x+y=10
100x+250y=1450
100x+100y=1000
-100x-250y=-1450
-150y=-450
y=3
x=7

]]> 2021-06-16 00:14:25 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714305 20314 송민혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714330 2021-06-16 00:14:26 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714330 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714949 정미네 반 남학생을 x명, 여학생을 y명이라고 한다.
x+y=45
0.75x+0.84y=36
x+y=45
75x+84y=3600
75x+75y=3375
75x+84y=3600
-9y=-225
y=25, x=20
안경을 쓴 여학생 수는 여학생의 84%이므로 25x0.84= 21명이다. ]]> 2021-06-16 00:14:48 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608714949 20325 이제서 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608715163 2021-06-16 00:14:55 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608715163 20315신한선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608717219 연필:X 볼펜:Y

X+Y=10
100X + 250Y=1450
100X+100Y=1000

150Y=450
Y=3
X=7

]]> 2021-06-16 00:16:04 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608717219 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608717228 x상자에 들어있는 공 모양 초콜릿의 갯수
y 상자에 들어있는 별 모양 초콜릿의 갯수
x+y=16
5x+3y+13=75
5x+5y=80
5x+3y=62
2y=18
y=9
x=7

]]> 2021-06-16 00:16:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608717228 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608717411 x=공모양 초콜릿개수
y=별모양 초콜릿개수
x+y=16
5x+3y=75-13
5x+5y=80
-5x-3y=62
2y=18
y=9
x=7]]> 2021-06-16 00:16:10 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608717411 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608718385 x=남y=여
x+y=45
0.75x+0.84y=36
75x+84y+3600
75x+75y=3375
9y=225
y=25 x=20
25곱하기 0.84=21
21명]]> 2021-06-16 00:16:41 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608718385 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608719754 5x+3y+13=75
5x+3y=62
x+y=16
3x+3y=48
2x=14
x=7
y=9
9개]]> 2021-06-16 00:17:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608719754 20316 심수민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608720316 x=공 모양 초콜릿
y=별 모양 초콜릿
x+y=16 ------ㄱ
5x+3y+13=75-- ㄴ
ㄴ식을 풀면
5x+3y=62----ㄷ
ㄱ식에3을 곱하고 ㄷ식에서 ㄱ식을 빼준다.
5x+3y=62
-3x+3y=48
2x =14
x=7 y=9 답=9개

]]> 2021-06-16 00:17:48 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608720316 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608720816 2x+10y=3400
x-y=500
X=700 Y=200
색연필=700원 도화지=200원]]> 2021-06-16 00:18:04 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608720816 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608721530 100x+100y=1000
-100x+250y=1450
-150y=-450
y=3,x=7
연필 7자루]]> 2021-06-16 00:18:27 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608721530 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608722597 x=공 모양 초콜릿
y=별 모양 초콜릿

5x+3y+13=75
5x+3y=62
x+y=16
3x+3y=48
2x=14
x=7
y=9

]]> 2021-06-16 00:19:02 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608722597 20312박준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608724033 연필:x 볼펜:y
x+y=10
100x+250y=1450
(x+y=10)×100
100x+100y=1000
100x+250y=1450
=150y=450
y=3 x=7]]> 2021-06-16 00:19:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608724033 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608725057 x+y=9
-9x+9y=27
x=3 y=6
처음수=36]]> 2021-06-16 00:20:23 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608725057 20315신한선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608725196 공 모양 초콜릿 : x
별 모양 초콜릿 : Y

5X + 3Y = 75 -13
X + Y = 16
5X + 5Y = 80

-2y = -18
y=9
별 모양 초콜릿 : 9개

]]> 2021-06-16 00:20:28 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608725196 20327이준우 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608725325 x=남학생수
y=여학생수

x+y=45
0.75x+0.84y=36
75x+84y=3600
-75x-75y=-3375
9y=225
y=25
x=20]]> 2021-06-16 00:20:32 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608725325 20306김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608726925 남=x 여=y
x+y=45
75/100x+84/100y=80/100x45
x+y=45
25x+28y=1200
-3y=-75 y=25
x+25=45 x=20
84/100x25=21
21명

]]> 2021-06-16 00:21:21 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608726925 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608728030 x+y=14
2x+3y=32
x=10 y=4
2점슛=10골 3점슛=4골]]> 2021-06-16 00:21:59 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608728030 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608728587 x=남학생 수
y=여학생 수

0.75x+0.84y=36
x+y=45
75x+84y=3600
75x+75y=3375
75x+84y=3600
-9y=-225
y=25, x=20

]]> 2021-06-16 00:22:18 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608728587 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608729998 x+y=16
5x+3y+13=75

3x+3y=48
-5x+3y+=62
-2x =-14
×=7
y=9
9개

]]> 2021-06-16 00:23:03 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608729998 20324 이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608730061 남학생을 x 여학생을 y라고 두면x+y=45
75/100x+84/100y=45X80/100
75x+84y=3600
75x+75y=3375
9y=225
y=25
x=20
25X84/100=21
21명

]]> 2021-06-16 00:23:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608730061 20330장준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608731472 x정미네반 여학생 수
y 정미네반 남학생 수
x+y=45
75x+84y=3600
75x+75y=3375
75x+84y=3600
-9y=-225
y=25
25X84/100
21
21명]]> 2021-06-16 00:23:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608731472 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608735167 연필=x 볼펜=y
x+y=10
100x+250y=1450
위 식에 10을 아래의 식에 1/10을 곱한다
10x+10y=100
10x+25y=145
두 식을 뺀다
-15y=-45
y=3 x=7
연필 7자루]]> 2021-06-16 00:25:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608735167 20320 윤서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608735671 2021-06-16 00:26:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608735671 20314 송민혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608735908 2021-06-16 00:26:14 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608735908 20329장준원 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608736933 2021-06-16 00:26:44 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608736933 20316 심수민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608738367 x=남학생 수,y=여학생 수
x+y=45 ---------ㄱ
75x+84y=3600--ㄴ
ㄴ-ㄱx75
75x+84y=3600
-75x+75y=3375
--------------------------
9y= 225
y=25
x=20
25x0.84=21
답=21명

]]> 2021-06-16 00:27:26 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608738367 20315 신한선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608740180 남학생수 : X
여학생수:Y
X+Y: 45
75X+84y+3600
75x+75y=3375
-9Y=-225
Y=25
X=20

]]> 2021-06-16 00:28:23 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608740180 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608741002 공모양 x / 별모양 y
x+y=16
5x+3y+13=75
위의 식에 3을 곱한다
3x+3y=48
5x+3y=75-13
두 식을 뺀다
-2x=-14
x=7 y=9
공모양 7개]]> 2021-06-16 00:28:50 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608741002 20312박준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608745145 별모양:x 별모양:y
x+y=16
5x+3y+13=75
5x+3y=62
3x+3y=48
2x=14
x=7
별모양 초콜릿: 9]]> 2021-06-16 00:31:01 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608745145 20311 남희선 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608748567 남학생:x 여학생:y
x+y=45
0.75x+0.84y=36
75x+84y=3600
75x+75y=3375
9y=225
y=25
x=20
25x0.84=21
21명

]]> 2021-06-16 00:32:54 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608748567 20305 김서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608749006 x=남학생,y=여학생

x+y=45
0.75x+0.84y=36
x+y=45
75x+84y=3600
75x+75y=3375
75x+84y=3600
-9y=-225
y=25,x=20
25x0.84=21

]]> 2021-06-16 00:33:07 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608749006 20312박준혁 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608749694 2021-06-16 00:33:27 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608749694 yuna7933 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608755226 2021-06-16 00:36:12 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608755226 20313 서채윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608755534 강물의 속력을 x, 두 선착장 사이의 거리를 y라고 한다.
강물을 따라 내려오는 속력 = 유람선 속력+ 강물 속력
강을 거슬러 올라가는 속력= 유람선 속력-강물 속력
y/10+x=25
y/10-x=50
y=250+25x
y=500-50x
250+25x=500-50x
75x=250
x=10/3, y=1000/3 선착장 사이의 거리는 1000/3m이다. ]]> 2021-06-16 00:36:22 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608755534 20316 심수민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608755736 2021-06-16 00:36:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608755736 20322 이서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608756001 x=강물의 속력
y=두 선착장 사이의 거리

y/10x+x=25
y/10-x=50
y=250+25x
y=500-50x
250+25x=500-50x
75x+250
x=10/3
y=1000/3

]]> 2021-06-16 00:36:37 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608756001 20321 이서영 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608756929 강물의 속력:x 두 선착장사이의 거리:y
y/x+10=25
y/10-x=50
y=25x+250
y=500-50x
500-50x=25x+250
75x=250
x=10/3 y=1000/3 선착장 사이의 거리: 1000/3m ]]> 2021-06-16 00:37:05 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608756929 20320윤서현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608757189 2021-06-16 00:37:13 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608757189 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608757688 남학생 x 여학생 y
x+y=45
0.75x+0.84y=36
위의식에 75를 아래의 식에 1/100을 곱한다
75x+75y=3375
75x+84y=3600
두 식을 뺀다
-9y=-225
y=25 x=20
여학생수 20명
y=]]> 2021-06-16 00:37:28 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608757688 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608761238 x + y = 10
100 x + 250 y = 1450
100 x + 100 y = 1000
- 100 x - 250 y = - 1450
- 150 y = - 450
y = 3
x = 7]]> 2021-06-16 00:39:15 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608761238 20324 이정민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608764105 강물 속력 x 선착장 사이 거리 y
y/10+x=25
y/10-x=50
y=250+25x
y=500-50x
75x=250
x=10/3
y=1000/3 m]]> 2021-06-16 00:40:38 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608764105 20306 김아현 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608764617 강 속력=x 선착상거리=y
x/10+y=25
x/y-10=50
x=250+25y
x=50y-500
250=750

]]> 2021-06-16 00:40:53 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608764617 20309김진민 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608767277 x+y=10
100x+250y=1450
100x+100y=1000
-100x+]]> 2021-06-16 00:42:12 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608767277 20310 남서윤 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608767897 강물의 속력 x/거리 y
25(x+10)=y
50(10-x)=y
정리하면
25x-y=-250
50x+y=500
두 식을 더한다
75x=250
x=10/3 y=1000/3
두 선착장 사이의 거리 1000/3 m]]> 2021-06-16 00:42:31 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608767897 20328 이현소 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608769643 x = 공 모양 초콜릿개수
y = 별 모양 초콜릿 개수
x + y = 16
5 x + 3 y = 75 - 13
5 x + 5 y = 80
- 5 x - 3 y = 62
2 y = 18
y = 9
x = 7]]> 2021-06-16 00:43:23 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608769643 20325 이제서 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608769840 x=연필y=볼펜
100x+250y1450]]> 2021-06-16 00:43:29 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1608769840 20332 황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1609839730 2021-06-16 12:35:45 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1609839730 232032황서진 https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1609864598 2021-06-16 12:49:08 UTC https://padlet.com/yuna7933/snhsczfou4ntw2g/wish/1609864598