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2 -5x < -14y 5x > 14y so 2.5x >7y and so 3x>7y

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Manager
Joined: 01 Jun 2006
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2 -5x < -14y 5x > 14y so 2.5x >7y and so 3x>7y [#permalink]  04 Oct 2006, 07:57
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2 -5x < -14y

5x > 14y so 2.5x >7y and so 3x>7y.

Last edited by rbcola on 29 Jun 2008, 06:40, edited 1 time in total.
Senior Manager
Joined: 30 Aug 2006
Posts: 374
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Kudos [?]: 25 [0], given: 0

I) INSUFF - don't know anything about x or y
II) -5x < -14y ( times through by -1)
5x > 14y (div by 2)
2.5x > 7y therefore 3x > 7y - SUFF

Director
Joined: 06 Sep 2006
Posts: 745
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Kudos [?]: 18 [0], given: 0

If x and y are positive, is 3x > 7y?
(1) x > y + 4
(2) -5x < -14y

x > 7/3 y
x > 2.11* y

1) Insuff.

2) 5x > 14y
x > 2.8 * y

B.
Director
Joined: 17 Jul 2006
Posts: 716
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Kudos [?]: 9 [0], given: 0

1 not sufficient.

2 -5x < -14y

5x > 14y so 2.5x >7y and so 3x>7y.

Director
Joined: 23 Jun 2005
Posts: 847
GMAT 1: 740 Q48 V42
Followers: 5

Kudos [?]: 36 [0], given: 1

B
Statement A:
x>y+4
3x>3y+12
Insufficient

Statement B:
-5x<-14y
x>14y/5
x>2.8Y
3x>8.4y

Sufficient
Manager
Joined: 01 Jun 2006
Posts: 80
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Kudos [?]: 0 [0], given: 0

right on guys. B is the correct answer
SVP
Joined: 05 Jul 2006
Posts: 1516
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Kudos [?]: 127 [0], given: 39

If x and y are positive, is 3x > 7y?
(1) x > y + 4
(2) -5x < -14y

from one

x-y>4....insuff they could be any thing

from two

5x>14y stem is 6x>14y

if 5x>14y thus sure 6x is

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