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