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If x, y, and a are integers, is x>y? 1). x+a > x-a 2).

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Director
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If x, y, and a are integers, is x>y? 1). x+a > x-a 2). [#permalink] New post 22 Feb 2006, 03:53
If x, y, and a are integers, is x>y?
1). x+a > x-a
2). ax>ay
Director
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 [#permalink] New post 22 Feb 2006, 04:19
1)

a>1/2
insufficient

2)

ax>ay, a could be positive or negative

1+2) sufficient

C
Director
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 [#permalink] New post 22 Feb 2006, 17:42
allabout wrote:
1)

a>1/2
insufficient

2)

ax>ay, a could be positive or negative

1+2) sufficient

C


oa is C

doesnt I. simplify to 2a>0-----> a>0 ?
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 [#permalink] New post 22 Feb 2006, 21:48
From (1), we can deduce that a > 0 (a > 1/2 is a mistake)
  [#permalink] 22 Feb 2006, 21:48
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If x, y, and a are integers, is x>y? 1). x+a > x-a 2).

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