-7=-7b+8b

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



-7=-7b+8b

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(+b)-7=0

We get rid of parentheses

-b-7=0

We add all the numbers together, and all the variables

-1b-7=0

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

-b=7

b=7/-1

b=-7

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