-7b+b-15=5b-8b

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Solution for -7b+b-15=5b-8b equation: 



-7b+b-15=5b-8b

We move all terms to the left:

-7b+b-15-(5b-8b)=0

We add all the numbers together, and all the variables

-7b+b-(-3b)-15=0

We add all the numbers together, and all the variables

-6b-(-3b)-15=0

We get rid of parentheses

-6b+3b-15=0

We add all the numbers together, and all the variables

-3b-15=0

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

-3b=15

b=15/-3

b=-5

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