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2+4-7m-7m=-8m-5m
We move all terms to the left:
2+4-7m-7m-(-8m-5m)=0
We add all the numbers together, and all the variables
-7m-7m-(-13m)+2+4=0
We add all the numbers together, and all the variables
-14m-(-13m)+6=0
We get rid of parentheses
-14m+13m+6=0
We add all the numbers together, and all the variables
-1m+6=0
We move all terms containing m to the left, all other terms to the right
-m=-6
m=-6/-1
m=+6
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