-90=-3(-6b-6)

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Solution for -90=-3(-6b-6) equation: 



-90=-3(-6b-6)

We move all terms to the left:

-90-(-3(-6b-6))=0



We calculate terms in parentheses: -(-3(-6b-6)), so:

-3(-6b-6)

We multiply parentheses

18b+18

Back to the equation:

-(18b+18)



We get rid of parentheses

-18b-18-90=0

We add all the numbers together, and all the variables

-18b-108=0

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

-18b=108

b=108/-18

b=-6

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