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6n-3=n+9
We move all terms to the left:
6n-3-(n+9)=0
We get rid of parentheses
6n-n-9-3=0
We add all the numbers together, and all the variables
5n-12=0
We move all terms containing n to the left, all other terms to the right
5n=12
n=12/5
n=2+2/5
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