-9b-4=-139

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Solution for -9b-4=-139 equation: 



-9b-4=-139

We move all terms to the left:

-9b-4-(-139)=0

We add all the numbers together, and all the variables

-9b+135=0

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

-9b=-135

b=-135/-9

b=+15

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