-3b-1=9+7b

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Solution for -3b-1=9+7b equation: 



-3b-1=9+7b

We move all terms to the left:

-3b-1-(9+7b)=0

We add all the numbers together, and all the variables

-3b-(7b+9)-1=0

We get rid of parentheses

-3b-7b-9-1=0

We add all the numbers together, and all the variables

-10b-10=0

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

-10b=10

b=10/-10

b=-1

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