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# Is │x│=│y│?

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18 Aug 2006, 21:59
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Is │x│=│y│?

(1) x -y = 6
(2) x +y = 0

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
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18 Aug 2006, 22:16
(B) Statement 2 alone is sufficient.

Stem asks whether |x|=|y|?

(1) x-y=6

or x=y-6. therefore |x|=|y| if x=-3, which is unknown. therefore insufficient.

(2) x+y=0

x=-y

therefore |x|=|y|

sufficient.

... my GMAT skills are rusty, is this correct?
18 Aug 2006, 22:16
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# Is │x│=│y│?

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