7+m=-7m-9

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



7+m=-7m-9

We move all terms to the left:

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

We get rid of parentheses

m+7m+9+7=0

We add all the numbers together, and all the variables

8m+16=0

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

8m=-16

m=-16/8

m=-2

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