-3b-6=15

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Solution for -3b-6=15 equation: 



-3b-6=15

We move all terms to the left:

-3b-6-(15)=0

We add all the numbers together, and all the variables

-3b-21=0

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

-3b=21

b=21/-3

b=-7

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