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8=n/3+7

We move all terms to the left:

8-(n/3+7)=0

We get rid of parentheses

-n/3-7+8=0

We multiply all the terms by the denominator

-n-7*3+8*3=0

We add all the numbers together, and all the variables

-1n+3=0

We move all terms containing n to the left, all other terms to the right

-n=-3

n=-3/-1

n=+3

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