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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

14b+69=0

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

14b=-69

b=-69/14

b=-4+13/14

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