-144=3(1-7b)

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Solution for -144=3(1-7b) equation: 



-144=3(1-7b)

We move all terms to the left:

-144-(3(1-7b))=0

We add all the numbers together, and all the variables

-(3(-7b+1))-144=0



We calculate terms in parentheses: -(3(-7b+1)), so:

3(-7b+1)

We multiply parentheses

-21b+3

Back to the equation:

-(-21b+3)



We get rid of parentheses

21b-3-144=0

We add all the numbers together, and all the variables

21b-147=0

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

21b=147

b=147/21

b=7

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