7x+13=8x-7

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Solution for 7x+13=8x-7 equation: 



7x+13=8x-7

We move all terms to the left:

7x+13-(8x-7)=0

We get rid of parentheses

7x-8x+7+13=0

We add all the numbers together, and all the variables

-1x+20=0

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

-x=-20

x=-20/-1

x=+20

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