7x-31=5x+9

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Solution for 7x-31=5x+9 equation: 



7x-31=5x+9

We move all terms to the left:

7x-31-(5x+9)=0

We get rid of parentheses

7x-5x-9-31=0

We add all the numbers together, and all the variables

2x-40=0

We move all terms containing x to the left, all other terms to the right

2x=40

x=40/2

x=20

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