-8=-9+m

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Solution for -8=-9+m equation: 



-8=-9+m

We move all terms to the left:

-8-(-9+m)=0

We add all the numbers together, and all the variables

-(m-9)-8=0

We get rid of parentheses

-m+9-8=0

We add all the numbers together, and all the variables

-1m+1=0

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

-m=-1

m=-1/-1

m=1

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