-9(-b-12)+3b=-18b+15+3

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Solution for -9(-b-12)+3b=-18b+15+3 equation: 



-9(-b-12)+3b=-18b+15+3

We move all terms to the left:

-9(-b-12)+3b-(-18b+15+3)=0

We add all the numbers together, and all the variables

-9(-1b-12)+3b-(-18b+18)=0

We add all the numbers together, and all the variables

3b-9(-1b-12)-(-18b+18)=0

We multiply parentheses

3b+9b-(-18b+18)+108=0

We get rid of parentheses

3b+9b+18b-18+108=0

We add all the numbers together, and all the variables

30b+90=0

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

30b=-90

b=-90/30

b=-3

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