90=-6(b-7)

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



90=-6(b-7)

We move all terms to the left:

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



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

-6(b-7)

We multiply parentheses

-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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