12b+-9b-b=-8

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Solution for 12b+-9b-b=-8 equation: 



12b+-9b-b=-8

We move all terms to the left:

12b+-9b-b-(-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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