7=m+-8

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Solution for 7=m+-8 equation: 



7=m+-8

We move all terms to the left:

7-(m+-8)=0

We add all the numbers together, and all the variables

-(m-8)+7=0

We get rid of parentheses

-m+8+7=0

We add all the numbers together, and all the variables

-1m+15=0

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

-m=-15

m=-15/-1

m=+15

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