3m-7m=12

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Solution for 3m-7m=12 equation: 



3m-7m=12

We move all terms to the left:

3m-7m-(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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