b-3+5b=12-9b

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Solution for b-3+5b=12-9b equation: 



b-3+5b=12-9b

We move all terms to the left:

b-3+5b-(12-9b)=0

We add all the numbers together, and all the variables

b+5b-(-9b+12)-3=0

We add all the numbers together, and all the variables

6b-(-9b+12)-3=0

We get rid of parentheses

6b+9b-12-3=0

We add all the numbers together, and all the variables

15b-15=0

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

15b=15

b=15/15

b=1

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