-3m-2m+9m=-12

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Solution for -3m-2m+9m=-12 equation: 



-3m-2m+9m=-12

We move all terms to the left:

-3m-2m+9m-(-12)=0

We add all the numbers together, and all the variables

4m+12=0

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

4m=-12

m=-12/4

m=-3

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