18=9+12b-3b

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



18=9+12b-3b

We move all terms to the left:

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

We add all the numbers together, and all the variables

-(9b+9)+18=0

We get rid of parentheses

-9b-9+18=0

We add all the numbers together, and all the variables

-9b+9=0

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

-9b=-9

b=-9/-9

b=1

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