-3(2m-1)=-12+21

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Solution for -3(2m-1)=-12+21 equation: 



-3(2m-1)=-12+21

We move all terms to the left:

-3(2m-1)-(-12+21)=0

We add all the numbers together, and all the variables

-3(2m-1)-9=0

We multiply parentheses

-6m+3-9=0

We add all the numbers together, and all the variables

-6m-6=0

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

-6m=6

m=6/-6

m=-1

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