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