8-7b=-9b

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



8-7b=-9b

We move all terms to the left:

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

We get rid of parentheses

-7b+9b+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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