-9b-9+4=-86

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Solution for -9b-9+4=-86 equation: 



-9b-9+4=-86

We move all terms to the left:

-9b-9+4-(-86)=0

We add all the numbers together, and all the variables

-9b+81=0

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

-9b=-81

b=-81/-9

b=+9

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