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-(1+m)=-1
We move all terms to the left:
-(1+m)-(-1)=0
We add all the numbers together, and all the variables
-(m+1)-(-1)=0
We add all the numbers together, and all the variables
-(m+1)+1=0
We get rid of parentheses
-m-1+1=0
We add all the numbers together, and all the variables
-m=0
m=0/-1
m=0
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