7m+12=-9

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Solution for 7m+12=-9 equation: 



7m+12=-9

We move all terms to the left:

7m+12-(-9)=0

We add all the numbers together, and all the variables

7m+21=0

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

7m=-21

m=-21/7

m=-3

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