-90=-6b-6(-2b+7)

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Solution for -90=-6b-6(-2b+7) equation: 



-90=-6b-6(-2b+7)

We move all terms to the left:

-90-(-6b-6(-2b+7))=0



We calculate terms in parentheses: -(-6b-6(-2b+7)), so:

-6b-6(-2b+7)

We multiply parentheses

-6b+12b-42

We add all the numbers together, and all the variables

6b-42

Back to the equation:

-(6b-42)



We get rid of parentheses

-6b+42-90=0

We add all the numbers together, and all the variables

-6b-48=0

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

-6b=48

b=48/-6

b=-8

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