-3(1+4b)=81

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Solution for -3(1+4b)=81 equation: 



-3(1+4b)=81

We move all terms to the left:

-3(1+4b)-(81)=0

We add all the numbers together, and all the variables

-3(4b+1)-81=0

We multiply parentheses

-12b-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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