3b-9=6b+3

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Solution for 3b-9=6b+3 equation: 



3b-9=6b+3

We move all terms to the left:

3b-9-(6b+3)=0

We get rid of parentheses

3b-6b-3-9=0

We add all the numbers together, and all the variables

-3b-12=0

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

-3b=12

b=12/-3

b=-4

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