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42=5n+2
We move all terms to the left:
42-(5n+2)=0
We get rid of parentheses
-5n-2+42=0
We add all the numbers together, and all the variables
-5n+40=0
We move all terms containing n to the left, all other terms to the right
-5n=-40
n=-40/-5
n=+8
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