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4n+2=5n+9
We move all terms to the left:
4n+2-(5n+9)=0
We get rid of parentheses
4n-5n-9+2=0
We add all the numbers together, and all the variables
-1n-7=0
We move all terms containing n to the left, all other terms to the right
-n=7
n=7/-1
n=-7
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