-3(2b+1)=9

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Solution for -3(2b+1)=9 equation: 



-3(2b+1)=9

We move all terms to the left:

-3(2b+1)-(9)=0

We multiply parentheses

-6b-3-9=0

We add all the numbers together, and all the variables

-6b-12=0

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

-6b=12

b=12/-6

b=-2

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