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-4m-2=-2m
We move all terms to the left:
-4m-2-(-2m)=0
We get rid of parentheses
-4m+2m-2=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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