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-79=-7+8m
We move all terms to the left:
-79-(-7+8m)=0
We add all the numbers together, and all the variables
-(8m-7)-79=0
We get rid of parentheses
-8m+7-79=0
We add all the numbers together, and all the variables
-8m-72=0
We move all terms containing m to the left, all other terms to the right
-8m=72
m=72/-8
m=-9
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