45
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Number = n
n-17=-28
add 17 to both sides
n = -11
so n=-11
and the number we started with is -11
-11-17=-28
6
N = -12 + 8*(17+28) = -12 + 8*45 = -12+360 = 348
6 and 28 are perfect numbers less than 50.
6 and 28
22