If x and y are positive integers and 1 + x + y + xy = 15, : PS Archive
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# If x and y are positive integers and 1 + x + y + xy = 15,

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VP
Joined: 03 Apr 2007
Posts: 1367
Followers: 4

Kudos [?]: 612 [0], given: 10

If x and y are positive integers and 1 + x + y + xy = 15, [#permalink]

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01 Jun 2008, 12:12
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If x and y are positive integers and 1 + x + y + xy = 15, what is the value of x + y?
A. 3
B. 5
C. 6
D. 8
E. 9
Director
Joined: 03 Sep 2006
Posts: 879
Followers: 6

Kudos [?]: 769 [0], given: 33

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01 Jun 2008, 15:16
goalsnr wrote:
If x and y are positive integers and 1 + x + y + xy = 15, what is the value of x + y?
A. 3
B. 5
C. 6
D. 8
E. 9

$$(4+2)+(4*2) = 14$$

Therefore, "C"
Re: PS -x+y   [#permalink] 01 Jun 2008, 15:16
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