-87=-3b+3(1-4b)

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Solution for -87=-3b+3(1-4b) equation: 



-87=-3b+3(1-4b)

We move all terms to the left:

-87-(-3b+3(1-4b))=0

We add all the numbers together, and all the variables

-(-3b+3(-4b+1))-87=0



We calculate terms in parentheses: -(-3b+3(-4b+1)), so:

-3b+3(-4b+1)

We multiply parentheses

-3b-12b+3

We add all the numbers together, and all the variables

-15b+3

Back to the equation:

-(-15b+3)



We get rid of parentheses

15b-3-87=0

We add all the numbers together, and all the variables

15b-90=0

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

15b=90

b=90/15

b=6

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