-3b+3(5b-1)=81

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Solution for -3b+3(5b-1)=81 equation: 



-3b+3(5b-1)=81

We move all terms to the left:

-3b+3(5b-1)-(81)=0

We multiply parentheses

-3b+15b-3-81=0

We add all the numbers together, and all the variables

12b-84=0

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

12b=84

b=84/12

b=7

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