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How much did each person receive at that last distribution?

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A generous man set aside a certain sum of money for equal distribution
weekly to the needy of his acquaintance. One day he remarked, "If there are
five fewer applicants next week, you will each receive two dollars more." Unfortunately,
instead of there being fewer there were actually four more persons
applying for the gift.
"This means," he pointed out, "that you will each receive one dollar less."
How much did each person receive at that last distribution?

posted Jan 23, 2015 by Nikita Sehgal

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1 Answer

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Answer: $6

number of recipients = x
each person received = y
sum of donation = x*y = xy
xy = (x-5)(y+2) = xy+2x-5y-10 --> 0 = 2x-5y-10 ...........(1)
xy = (x+4)(y-1) = xy-x+4y-4 --> 0 = -x +4y-4 or 0 = -2x +8y -8 ............(2)
(1) + (2) = 3y-18 = 0
We find y (each person received) = 6 ($)
and x (number of recipients) = 20
sum of donation = 20*$6 = $120

answer Nov 14, 2015 by Parlin Simanjuntak



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