9b-3b=12,b

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Solution for 9b-3b=12,b equation: 



9b-3b=12.b

We move all terms to the left:

9b-3b-(12.b)=0

We add all the numbers together, and all the variables

9b-3b-(+12.b)=0

We add all the numbers together, and all the variables

6b-(+12.b)=0

We get rid of parentheses

6b-12.b=0

We add all the numbers together, and all the variables

-6b=0

b=0/-6

b=0

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