-3b+9b=18+8b

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Solution for -3b+9b=18+8b equation: 



-3b+9b=18+8b

We move all terms to the left:

-3b+9b-(18+8b)=0

We add all the numbers together, and all the variables

-3b+9b-(8b+18)=0

We add all the numbers together, and all the variables

6b-(8b+18)=0

We get rid of parentheses

6b-8b-18=0

We add all the numbers together, and all the variables

-2b-18=0

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

-2b=18

b=18/-2

b=-9

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