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How do you create equations with a variable on both sides and use them to solve problems?

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Use the distributive property to get rid of parentheses by multiplying the number in front by the numbers on the inside.

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Combine and move letters to one side of the equation, and numbers to the other side.

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Isolate the variable by doing the opposite of what is being done in the problem. (If the problem is multiplying, we divide) etc

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https://www.onlinemathlearning.com/image-files/multistep-equations.png

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https://www.chilimath.com/wp-content/uploads/2018/08/multi-step-equations-solution-for-problem-1.png

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Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method.

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https://www.chilimath.com/wp-content/uploads/2020/02/problem-number_2-multi-step-practice-889x1024.gif

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2x + 3x + 5 = 20
I combine like terms
5x + 5 = 20
I subtract 5 on both sides
5x = 15
I divide by 5 on both sides
x = 3