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20n-28=10n+3
We move all terms to the left:
20n-28-(10n+3)=0
We get rid of parentheses
20n-10n-3-28=0
We add all the numbers together, and all the variables
10n-31=0
We move all terms containing n to the left, all other terms to the right
10n=31
n=31/10
n=3+1/10
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