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-8=m/7+2
We move all terms to the left:
-8-(m/7+2)=0
We get rid of parentheses
-m/7-2-8=0
We multiply all the terms by the denominator
-m-2*7-8*7=0
We add all the numbers together, and all the variables
-1m-70=0
We move all terms containing m to the left, all other terms to the right
-m=70
m=70/-1
m=-70
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