For n+9=18, the answer would be n=9 because n+9=18 also mean 18-9=n so 18-9=9
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Oh, dude, if 5 plus n equals 23, then n must be 18, right? So, if you wanna find out what n minus 5 equals, just subtract 5 from 18 and you get 13. Easy peasy lemon squeezy.
3n+6=18 n+2=6 n=4
-24
4n - 2n = 18 Therefore, 2n = 18 Therefore, n = 18/2 = 9
2 plus n is the true one, but 1 plus n is not?