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-13=m/2
We move all terms to the left:
-13-(m/2)=0
We add all the numbers together, and all the variables
-(+m/2)-13=0
We get rid of parentheses
-m/2-13=0
We multiply all the terms by the denominator
-m-13*2=0
We add all the numbers together, and all the variables
-1m-26=0
We move all terms containing m to the left, all other terms to the right
-m=26
m=26/-1
m=-26
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