-7(3b+3)+5(4b-3)=-39

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Solution for -7(3b+3)+5(4b-3)=-39 equation: 



-7(3b+3)+5(4b-3)=-39

We move all terms to the left:

-7(3b+3)+5(4b-3)-(-39)=0

We add all the numbers together, and all the variables

-7(3b+3)+5(4b-3)+39=0

We multiply parentheses

-21b+20b-21-15+39=0

We add all the numbers together, and all the variables

-1b+3=0

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

-b=-3

b=-3/-1

b=+3

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