9b-18=3b+12

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Solution for 9b-18=3b+12 equation: 



9b-18=3b+12

We move all terms to the left:

9b-18-(3b+12)=0

We get rid of parentheses

9b-3b-12-18=0

We add all the numbers together, and all the variables

6b-30=0

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

6b=30

b=30/6

b=5

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