15=b-9+6b=30

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Solution for 15=b-9+6b=30 equation: 



15=b-9+6b=30

We move all terms to the left:

15-(b-9+6b)=0

We add all the numbers together, and all the variables

-(7b-9)+15=0

We get rid of parentheses

-7b+9+15=0

We add all the numbers together, and all the variables

-7b+24=0

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

-7b=-24

b=-24/-7

b=3+3/7

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