-7=2b+5b

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Solution for -7=2b+5b equation: 



-7=2b+5b

We move all terms to the left:

-7-(2b+5b)=0

We add all the numbers together, and all the variables

-(+7b)-7=0

We get rid of parentheses

-7b-7=0

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

-7b=7

b=7/-7

b=-1

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