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15/45=n/45
We move all terms to the left:
15/45-(n/45)=0
We add all the numbers together, and all the variables
-(+n/45)+15/45=0
We get rid of parentheses
-n/45+15/45=0
We multiply all the terms by the denominator
-n+15=0
We add all the numbers together, and all the variables
-1n+15=0
We move all terms containing n to the left, all other terms to the right
-n=-15
n=-15/-1
n=+15
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