-7b+3b-13=8-7b

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Solution for -7b+3b-13=8-7b equation: 



-7b+3b-13=8-7b

We move all terms to the left:

-7b+3b-13-(8-7b)=0

We add all the numbers together, and all the variables

-7b+3b-(-7b+8)-13=0

We add all the numbers together, and all the variables

-4b-(-7b+8)-13=0

We get rid of parentheses

-4b+7b-8-13=0

We add all the numbers together, and all the variables

3b-21=0

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

3b=21

b=21/3

b=7

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