18=m+-2

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Solution for 18=m+-2 equation: 



18=m+-2

We move all terms to the left:

18-(m+-2)=0

We add all the numbers together, and all the variables

-(m-2)+18=0

We get rid of parentheses

-m+2+18=0

We add all the numbers together, and all the variables

-1m+20=0

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

-m=-20

m=-20/-1

m=+20

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