-15+b+4b+12=2b+6

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Solution for -15+b+4b+12=2b+6 equation: 



-15+b+4b+12=2b+6

We move all terms to the left:

-15+b+4b+12-(2b+6)=0

We add all the numbers together, and all the variables

5b-(2b+6)-3=0

We get rid of parentheses

5b-2b-6-3=0

We add all the numbers together, and all the variables

3b-9=0

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

3b=9

b=9/3

b=3

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