13=8-7x

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Solution for 13=8-7x equation: 



13=8-7x

We move all terms to the left:

13-(8-7x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

7x-8+13=0

We add all the numbers together, and all the variables

7x+5=0

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

7x=-5

x=-5/7

x=-5/7

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