3b-9b=+7b

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Solution for 3b-9b=+7b equation: 



3b-9b=+7b

We move all terms to the left:

3b-9b-(+7b)=0

We add all the numbers together, and all the variables

-6b-(+7b)=0

We get rid of parentheses

-6b-7b=0

We add all the numbers together, and all the variables

-13b=0

b=0/-13

b=0

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