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-1=m/13-14
We move all terms to the left:
-1-(m/13-14)=0
We get rid of parentheses
-m/13+14-1=0
We multiply all the terms by the denominator
-m+14*13-1*13=0
We add all the numbers together, and all the variables
-1m+169=0
We move all terms containing m to the left, all other terms to the right
-m=-169
m=-169/-1
m=+169
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