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-4=-2-2m
We move all terms to the left:
-4-(-2-2m)=0
We add all the numbers together, and all the variables
-(-2m-2)-4=0
We get rid of parentheses
2m+2-4=0
We add all the numbers together, and all the variables
2m-2=0
We move all terms containing m to the left, all other terms to the right
2m=2
m=2/2
m=1
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