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5n=-2n+28
We move all terms to the left:
5n-(-2n+28)=0
We get rid of parentheses
5n+2n-28=0
We add all the numbers together, and all the variables
7n-28=0
We move all terms containing n to the left, all other terms to the right
7n=28
n=28/7
n=4
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