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-3(-n+3)=36
We move all terms to the left:
-3(-n+3)-(36)=0
We add all the numbers together, and all the variables
-3(-1n+3)-36=0
We multiply parentheses
3n-9-36=0
We add all the numbers together, and all the variables
3n-45=0
We move all terms containing n to the left, all other terms to the right
3n=45
n=45/3
n=15
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