-147=-3(7b-7)

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Solution for -147=-3(7b-7) equation: 



-147=-3(7b-7)

We move all terms to the left:

-147-(-3(7b-7))=0



We calculate terms in parentheses: -(-3(7b-7)), so:

-3(7b-7)

We multiply parentheses

-21b+21

Back to the equation:

-(-21b+21)



We get rid of parentheses

21b-21-147=0

We add all the numbers together, and all the variables

21b-168=0

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

21b=168

b=168/21

b=8

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