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If |d - 9| = 2d, then d = A. -9 B. -3 C. 1 D. 3 E. 9

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Manager
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Joined: 10 Dec 2005
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If |d - 9| = 2d, then d = A. -9 B. -3 C. 1 D. 3 E. 9 [#permalink] New post 24 Dec 2005, 21:46
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B
C
D
E

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If |d - 9| = 2d, then d =

A. -9
B. -3
C. 1
D. 3
E. 9
_________________

JAI HIND!

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Joined: 06 Jun 2004
Posts: 1062
Location: CA
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GMAT Tests User
Re: DS: Absolute value [#permalink] New post 24 Dec 2005, 21:52
JAI HIND wrote:
If |d - 9| = 2d, then d =

A. -9
B. -3
C. 1
D. 3
E. 9


Answer is D

d - 9 = 2d, d ==> d = -9
d - 9 = -2d, d ==> d = 3

3 is the only one that works
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Don't be afraid to take a flying leap of faith.. If you risk nothing, than you gain nothing...

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Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
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 [#permalink] New post 25 Dec 2005, 00:20
D

|d-9| = 2d means -(d-9) = 2d or (d-9) = 2d

These give us d = 3 and d= -9

But the right hand side part of main equation suggests that d must be positive. So Ans is 3 i.e D
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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

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Re: DS: Absolute value [#permalink] New post 25 Dec 2005, 05:50
JAI HIND wrote:
If |d - 9| = 2d, then d =

A. -9
B. -3
C. 1
D. 3
E. 9

Brute force! D
is it so simple or maybe some trap here))?
Re: DS: Absolute value   [#permalink] 25 Dec 2005, 05:50
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If |d - 9| = 2d, then d = A. -9 B. -3 C. 1 D. 3 E. 9

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