-97=-20+7b

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Solution for -97=-20+7b equation: 



-97=-20+7b

We move all terms to the left:

-97-(-20+7b)=0

We add all the numbers together, and all the variables

-(7b-20)-97=0

We get rid of parentheses

-7b+20-97=0

We add all the numbers together, and all the variables

-7b-77=0

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

-7b=77

b=77/-7

b=-11

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