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3n-15=4n+1
We move all terms to the left:
3n-15-(4n+1)=0
We get rid of parentheses
3n-4n-1-15=0
We add all the numbers together, and all the variables
-1n-16=0
We move all terms containing n to the left, all other terms to the right
-n=16
n=16/-1
n=-16
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