9=7+m

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Solution for 9=7+m equation: 



9=7+m

We move all terms to the left:

9-(7+m)=0

We add all the numbers together, and all the variables

-(m+7)+9=0

We get rid of parentheses

-m-7+9=0

We add all the numbers together, and all the variables

-1m+2=0

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

-m=-2

m=-2/-1

m=+2

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