-7(3b+2)=-21=6b

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Solution for -7(3b+2)=-21=6b equation: 



-7(3b+2)=-21=6b

We move all terms to the left:

-7(3b+2)-(-21)=0

We add all the numbers together, and all the variables

-7(3b+2)+21=0

We multiply parentheses

-21b-14+21=0

We add all the numbers together, and all the variables

-21b+7=0

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

-21b=-7

b=-7/-21

b=1/3

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