2b-12=b-9

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



2b-12=b-9

We move all terms to the left:

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

We get rid of parentheses

2b-b+9-12=0

We add all the numbers together, and all the variables

b-3=0

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

b=3

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