Question 899394
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Hi
720/(n-3) = 720/n + 40
720n = 720(n-3) + 40n(n-3)
 40n^2 -120n - 3*720 = 0
   n^2 - 3n -54 = 0
(n-9)(n+6) = 0,   n = 9 (tossing out negative solution for count)
 Originally 9 people
And...
$720/6 = $720/9 + $40 = $120