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4+n/2=12
We move all terms to the left:
4+n/2-(12)=0
We add all the numbers together, and all the variables
n/2-8=0
We multiply all the terms by the denominator
n-8*2=0
We add all the numbers together, and all the variables
n-16=0
We move all terms containing n to the left, all other terms to the right
n=16
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