-12+7b=-4(3+7b)

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Solution for -12+7b=-4(3+7b) equation: 



-12+7b=-4(3+7b)

We move all terms to the left:

-12+7b-(-4(3+7b))=0

We add all the numbers together, and all the variables

7b-(-4(7b+3))-12=0



We calculate terms in parentheses: -(-4(7b+3)), so:

-4(7b+3)

We multiply parentheses

-28b-12

Back to the equation:

-(-28b-12)



We get rid of parentheses

7b+28b+12-12=0

We add all the numbers together, and all the variables

35b=0

b=0/35

b=0

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