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)=0

We add all the numbers together, and all the variables

12b-(+b)-9=0

We get rid of parentheses

12b-b-9=0

We add all the numbers together, and all the variables

11b-9=0

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

11b=9

b=9/11

b=9/11

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