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3(2n-4)=15
We move all terms to the left:
3(2n-4)-(15)=0
We multiply parentheses
6n-12-15=0
We add all the numbers together, and all the variables
6n-27=0
We move all terms containing n to the left, all other terms to the right
6n=27
n=27/6
n=4+1/2
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