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13=5n-5-2
We move all terms to the left:
13-(5n-5-2)=0
We add all the numbers together, and all the variables
-(5n-7)+13=0
We get rid of parentheses
-5n+7+13=0
We add all the numbers together, and all the variables
-5n+20=0
We move all terms containing n to the left, all other terms to the right
-5n=-20
n=-20/-5
n=+4
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