18b-12=3b-9

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



18b-12=3b-9

We move all terms to the left:

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

We get rid of parentheses

18b-3b+9-12=0

We add all the numbers together, and all the variables

15b-3=0

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

15b=3

b=3/15

b=1/5

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