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m/2-9=-15
We move all terms to the left:
m/2-9-(-15)=0
We add all the numbers together, and all the variables
m/2+6=0
We multiply all the terms by the denominator
m+6*2=0
We add all the numbers together, and all the variables
m+12=0
We move all terms containing m to the left, all other terms to the right
m=-12
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