-87=-3(8+3b)

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Solution for -87=-3(8+3b) equation: 



-87=-3(8+3b)

We move all terms to the left:

-87-(-3(8+3b))=0

We add all the numbers together, and all the variables

-(-3(3b+8))-87=0



We calculate terms in parentheses: -(-3(3b+8)), so:

-3(3b+8)

We multiply parentheses

-9b-24

Back to the equation:

-(-9b-24)



We get rid of parentheses

9b+24-87=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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