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-2(2m+70)=-28-6m
We move all terms to the left:
-2(2m+70)-(-28-6m)=0
We add all the numbers together, and all the variables
-2(2m+70)-(-6m-28)=0
We multiply parentheses
-4m-(-6m-28)-140=0
We get rid of parentheses
-4m+6m+28-140=0
We add all the numbers together, and all the variables
2m-112=0
We move all terms containing m to the left, all other terms to the right
2m=112
m=112/2
m=56
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