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-4n+20=5n+2
We move all terms to the left:
-4n+20-(5n+2)=0
We get rid of parentheses
-4n-5n-2+20=0
We add all the numbers together, and all the variables
-9n+18=0
We move all terms containing n to the left, all other terms to the right
-9n=-18
n=-18/-9
n=+2
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