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7-m/2=12
We move all terms to the left:
7-m/2-(12)=0
We add all the numbers together, and all the variables
-m/2-5=0
We multiply all the terms by the denominator
-m-5*2=0
We add all the numbers together, and all the variables
-1m-10=0
We move all terms containing m to the left, all other terms to the right
-m=10
m=10/-1
m=-10
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