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n/2+12=66
We move all terms to the left:
n/2+12-(66)=0
We add all the numbers together, and all the variables
n/2-54=0
We multiply all the terms by the denominator
n-54*2=0
We add all the numbers together, and all the variables
n-108=0
We move all terms containing n to the left, all other terms to the right
n=108
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