m-5m+9-12+7m=-9

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Solution for m-5m+9-12+7m=-9 equation: 



m-5m+9-12+7m=-9

We move all terms to the left:

m-5m+9-12+7m-(-9)=0

We add all the numbers together, and all the variables

3m+6=0

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

3m=-6

m=-6/3

m=-2

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