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2=m+8+1
We move all terms to the left:
2-(m+8+1)=0
We add all the numbers together, and all the variables
-(m+9)+2=0
We get rid of parentheses
-m-9+2=0
We add all the numbers together, and all the variables
-1m-7=0
We move all terms containing m to the left, all other terms to the right
-m=7
m=7/-1
m=-7
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