-3(m-1)=6m+21

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Solution for -3(m-1)=6m+21 equation: 



-3(m-1)=6m+21

We move all terms to the left:

-3(m-1)-(6m+21)=0

We multiply parentheses

-3m-(6m+21)+3=0

We get rid of parentheses

-3m-6m-21+3=0

We add all the numbers together, and all the variables

-9m-18=0

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

-9m=18

m=18/-9

m=-2

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