-1-3(3b+7)=-85

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Solution for -1-3(3b+7)=-85 equation: 



-1-3(3b+7)=-85

We move all terms to the left:

-1-3(3b+7)-(-85)=0

We add all the numbers together, and all the variables

-3(3b+7)+84=0

We multiply parentheses

-9b-21+84=0

We add all the numbers together, and all the variables

-9b+63=0

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

-9b=-63

b=-63/-9

b=+7

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