Exit Ticket by Barbara Amador

Ms. BARBARA

bamador — 2013-12-03 13:56:42 UTC

What is the difference between using elimination with addition/subtraction to solve systems of equations and elimination with multiplication?

Jae Cheol Lee

2013-12-03 15:45:01 UTC

The difference between using elimination with addition or subtraction and elimination with multiplication is that in the addition or subtraction you just look up for numbers with opposite signs and same coefficient you would need to subtract or add if they are the same number and same sign.

Elimination with multiplication you choose the easiest variables and then you would need to look up for the least common number and then you would need to multiply to get that number and then you solve it.

Alejandro Escobar

2013-12-03 15:45:10 UTC

The difference of using addition and subtraction than using multiplication is that in multiplication you do one more step which is multiply. Also in addition or subtraction you need to have in the originial equation the same coefficients.

Ivanna

2013-12-03 15:45:11 UTC

The difference is that when you multiply, the coefficients can change to have opposites and eliminate x or y. But, in addition or subtraction you can't solve the system of equations without multiplying because they wouldn't have the same coefficients.

Natalie Blandon

2013-12-03 15:45:33 UTC

Adding or Subtracting you need to have same coefficients with opposite signs and multiplication you can have different coefficients with the same signs but then multiply and change it.

Carlos Urcuyo

2013-12-03 15:45:39 UTC

When using multiplication there is more steps including adding and subtracting. Also we can use multiplication when the coefficients of the variables are different.

Lauren Fonseca

2013-12-03 15:45:51 UTC

When you use addition or substraction one variable has to have the same coefficient. When you use multiplication, the variable don't have the same coefficient.

Ji Eun Kim

2013-12-03 15:46:02 UTC

When we use addition or subtraction, there has to be at least terms with the same coefficient and variable, but if we use multiplication, the variable terms doesn't need to have the same coefficient.

Jorge Huerta

bhuerta — 2013-12-03 15:46:07 UTC

The difference between solving a system of equations using addition/subtraction and using multiplication is the following.

In addition/subtraction the one of the coeffecients must be the same, they can have different signs but same coefficients. All that is deem neccesary is to add or subtract first to eliminate a variable.

In multiplication, the coefficients are different. To solve the equations, you must find the least common multiple of a coefficient, then multiply one or two equations to get the same coefficients. Then it is possible to solve the equations.

Maggie Huang

2013-12-03 15:46:07 UTC

the difference using substrction and addition and elimination between multiplication is that when you eliminate by multiplication you can eliminate variables that do not have the same coeficient.

Mariela Guadamuz

2013-12-03 15:46:11 UTC

When you use elimination with multiplication, the coefficient of the dependent or independent variable of the original equations doesn't have to be the same but when it is elimination with adding or subtracting, the coefficient in both equations have to be the same.

Camila Mencia

2013-12-03 15:46:21 UTC

When you use addition and subtraction for elimination you usually end faster and do not use multiplication or division in any phase. Also, the coefficient doesn't change. When using multiplication, sometimes your coefficients are completely different as well as your equations.

Víctor Hondoy

2013-12-03 15:47:06 UTC

The difference between using elimination with addition and subtraction is that when you are trying to apply addition you need to make sure that the coefficents are the opposite and when you are doing subtraction you need to make sure that the coefficients have the same number but opposite sign. In multiplication, you need to multiply one equation to make the coeffients the same or the opposite depending on the method you are trying to use...

Karla Guevara

2013-12-03 15:47:26 UTC

The difference between using elimination with addition/subtraction to solve systems of equations and elimination with multiplication is that for multiplication you change the equation completely and when you add/subtract you only change to the opposite sign.

Olinto Perez

2013-12-03 15:47:50 UTC

Olinto Perez

2013-12-03 15:49:06 UTC

linear equations sytems using adding and substarcting is slower than using multiplication and it allows to solve previously unsolvable problems.