9b-b+(-7b)=12

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Solution for 9b-b+(-7b)=12 equation: 



9b-b+(-7b)=12

We move all terms to the left:

9b-b+(-7b)-(12)=0

We add all the numbers together, and all the variables

8b+(-7b)-12=0

We get rid of parentheses

8b-7b-12=0

We add all the numbers together, and all the variables

b-12=0

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

b=12

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