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5(n+3)+7n=111
We move all terms to the left:
5(n+3)+7n-(111)=0
We add all the numbers together, and all the variables
7n+5(n+3)-111=0
We multiply parentheses
7n+5n+15-111=0
We add all the numbers together, and all the variables
12n-96=0
We move all terms containing n to the left, all other terms to the right
12n=96
n=96/12
n=8
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