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3m-4=-4-7m-m
We move all terms to the left:
3m-4-(-4-7m-m)=0
We add all the numbers together, and all the variables
3m-(-8m-4)-4=0
We get rid of parentheses
3m+8m+4-4=0
We add all the numbers together, and all the variables
11m=0
m=0/11
m=0
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