Posted by Phillip on Sunday, September 14, 2008 at 7:12pm.
n-2, n, n+2
n-2 + n + n+2 = -30
3 n = -30
n=-10
so
-12 , -10, -8
=======================
n + n+1 + n+2 + n+3 = 26 etc
I get it but why do we do n-2?
The second one equals to 32
I did n-2 to get n in the middle so I would get a simple 3n on the left. I could just as well have used:
n + n+2 + n+4
or
n-4 + n-2 + n
Also notice that the fact that it is odd or even is not used. Luckily it comes out with n even.
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