-9b=-7b-8

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Solution for -9b=-7b-8 equation: 



-9b=-7b-8

We move all terms to the left:

-9b-(-7b-8)=0

We get rid of parentheses

-9b+7b+8=0

We add all the numbers together, and all the variables

-2b+8=0

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

-2b=-8

b=-8/-2

b=+4

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