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

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

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24 Dec 2005, 21:46
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If |d - 9| = 2d, then d =

A. -9
B. -3
C. 1
D. 3
E. 9
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JAI HIND!

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Joined: 06 Jun 2004
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Location: CA
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Re: DS: Absolute value [#permalink]

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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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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]

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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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