12b-9-2b-b=-87

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Solution for 12b-9-2b-b=-87 equation: 



12b-9-2b-b=-87

We move all terms to the left:

12b-9-2b-b-(-87)=0

We add all the numbers together, and all the variables

9b+78=0

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

9b=-78

b=-78/9

b=-8+2/3

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