-3b-8=7+2b

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Solution for -3b-8=7+2b equation: 



-3b-8=7+2b

We move all terms to the left:

-3b-8-(7+2b)=0

We add all the numbers together, and all the variables

-3b-(2b+7)-8=0

We get rid of parentheses

-3b-2b-7-8=0

We add all the numbers together, and all the variables

-5b-15=0

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

-5b=15

b=15/-5

b=-3

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