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