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5(2n+2)+4(n+7)+n+3=86
We move all terms to the left:
5(2n+2)+4(n+7)+n+3-(86)=0
We add all the numbers together, and all the variables
n+5(2n+2)+4(n+7)-83=0
We multiply parentheses
n+10n+4n+10+28-83=0
We add all the numbers together, and all the variables
15n-45=0
We move all terms containing n to the left, all other terms to the right
15n=45
n=45/15
n=3
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