12b-9+12b=7b-3+18b

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Solution for 12b-9+12b=7b-3+18b equation: 



12b-9+12b=7b-3+18b

We move all terms to the left:

12b-9+12b-(7b-3+18b)=0

We add all the numbers together, and all the variables

12b+12b-(25b-3)-9=0

We add all the numbers together, and all the variables

24b-(25b-3)-9=0

We get rid of parentheses

24b-25b+3-9=0

We add all the numbers together, and all the variables

-1b-6=0

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

-b=6

b=6/-1

b=-6

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