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8(7+5n)+3=339
We move all terms to the left:
8(7+5n)+3-(339)=0
We add all the numbers together, and all the variables
8(5n+7)+3-339=0
We add all the numbers together, and all the variables
8(5n+7)-336=0
We multiply parentheses
40n+56-336=0
We add all the numbers together, and all the variables
40n-280=0
We move all terms containing n to the left, all other terms to the right
40n=280
n=280/40
n=7
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