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If 2x>3y , is x negative ? 1. y> 0 2. 2x+ 5y 20 =0 [#permalink]
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23 Aug 2009, 01:09
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If 2x>3y , is x negative ? 1. y> 0 2. 2x+ 5y 20 =0 == Message from GMAT Club Team == This is not a quality discussion. It has been retired. If you would like to discuss this question please repost it in the respective forum. Thank you! To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative  Verbal Please note  we may remove posts that do not follow our posting guidelines. Thank you.



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Re: GMAT prep [#permalink]
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23 Aug 2009, 01:32
If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0
IMO A:
For 2x>3y if Y is positive the for LHS to be greater it should be positive whihc can only be possible when X would be negative...SUFF
2nd stmt: 2x <  3y > in eqn 2x+ 5y =20..... here what could be 2x = 4y, 5y, 6y,7y and so on.... as 2x <  3y, so we see that y can be + as well as ve....NOT SUFF
Let me know if iam correct



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Re: GMAT prep [#permalink]
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23 Aug 2009, 03:12
tkarthi4u wrote: If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0 for 1). 2x>3y, y>0, so 2x>0, x<0, suf for 2). 2x>3y, 2x+5y20=0 so 5y20=2x, then 5y20>3y, we can get 2y>20, y>10 put y>10 back into 2x+ 5y 20 =0, x must be <0 suf answer is D.
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Re: GMAT prep [#permalink]
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23 Aug 2009, 04:25
flyingbunny wrote: tkarthi4u wrote: If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0 for 1). 2x>3y, y>0, so 2x>0, x<0, suf for 2). 2x>3y, 2x+5y20=0 so 5y20=2x, then 5y20>3y, we can get 2y>20, y>10 put y>10 back into 2x+ 5y 20 =0, x must be <0 suf answer is D. Can you cite any reason in my reasoning ... 2nd stmt: 2x <  3y > in eqn 2x+ 5y =20..... here what could be 2x = 4y, 5y, 6y,7y and so on.... as 2x <  3y, so we see that y can be + as well as ve....NOT SUFF... If 4y we take , then y +ve , else y ve....so X cant be determined... pLs explain



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Re: GMAT prep [#permalink]
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23 Aug 2009, 06:46
rohansherry wrote: flyingbunny wrote: tkarthi4u wrote: If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0 for 1). 2x>3y, y>0, so 2x>0, x<0, suf for 2). 2x>3y, 2x+5y20=0 so 5y20=2x, then 5y20>3y, we can get 2y>20, y>10 put y>10 back into 2x+ 5y 20 =0, x must be <0 suf answer is D. Can you cite any reason in my reasoning ... 2nd stmt: 2x <  3y > in eqn 2x+ 5y =20..... here what could be 2x = 4y, 5y, 6y,7y and so on.... as 2x <  3y, so we see that y can be + as well as ve....NOT SUFF... If 4y we take , then y +ve , else y ve....so X cant be determined... pLs explain don't understand what you wrote.
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Re: GMAT prep [#permalink]
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23 Aug 2009, 08:29
Thanks flyingbunny. i get it.



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Re: GMAT prep [#permalink]
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27 Aug 2009, 05:39
I may have done something wrong but I answered C..
1. 2x>3y x<3/2y
If y=1, then x<3/2 not suff
2. 2x+5y20 = 0 insuff
Combined : if Y=1 2x15=0 suff
Can someone telle me where I am wrong? Thx



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Re: GMAT prep [#permalink]
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27 Aug 2009, 07:01
defoue wrote: I may have done something wrong but I answered C..
1. 2x>3y x<3/2y If y=1, then x<3/2 not suff
2. 2x+5y20 = 0 insuff
Combined : if Y=1 2x15=0 suff
Can someone telle me where I am wrong? Thx See the red part it should be negative



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Re: GMAT prep [#permalink]
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27 Aug 2009, 08:55
Given 2x > 3y
STMT 1: y> 0 or y is +ve or 3y is +ve
for 2x to be greater than a +ve number 3y, x has to be ve.
Suff.
STMT 2: 2x+5y  20 = 0 or 2x = 5y  20
replacing the value of 2x in the given inequality
5y  20 > 3y
or 5y  3y > 20 or y > 10
So for 2x to be greater than 3*10
2x > 30 or x > 15 or x < 15
Suff.
Both Individually are Suff.  D



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Re: GMAT prep [#permalink]
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28 Aug 2009, 03:58
rohansherry wrote: flyingbunny wrote: tkarthi4u wrote: If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0 for 1). 2x>3y, y>0, so 2x>0, x<0, suf for 2). 2x>3y, 2x+5y20=0 so 5y20=2x, then 5y20>3y, we can get 2y>20, y>10 put y>10 back into 2x+ 5y 20 =0, x must be <0 suf answer is D. Can you cite any reason in my reasoning ... 2nd stmt: 2x <  3y > in eqn 2x+ 5y =20..... here what could be 2x = 4y, 5y, 6y,7y and so on.... as 2x <  3y, so we see that y can be + as well as ve....NOT SUFF... If 4y we take , then y +ve , else y ve....so X cant be determined... pLs explain 2nd stmt: 2x <  3y > in eqn 2x+ 5y =20..... here what could be 2x = 4y, 5y, 6y,7yThis part is not correct. 2x cannot be 4y,5y, 6y .... 2x = 20  5y that's all we know



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Re: GMAT prep [#permalink]
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28 Aug 2009, 04:15
flyingbunny wrote: tkarthi4u wrote: If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0 for 1). 2x>3y, y>0, so 2x>0, x<0, suf for 2). 2x>3y, 2x+5y20=0 so 5y20=2x, then 5y20>3y, we can get 2y>20, y>10 put y>10 back into 2x+ 5y 20 =0, x must be <0 suf answer is D. Love your explaination. I almost solved it except that I could not think of this at all(the one in red). You really need to pay close attention to every detail , eh!
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Re: GMAT prep [#permalink]
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28 Aug 2009, 07:55
bhanushalinikhil wrote: flyingbunny wrote: tkarthi4u wrote: If 2x>3y , is x negative ?
1. y> 0 2. 2x+ 5y 20 =0 for 1). 2x>3y, y>0, so 2x>0, x<0, suf for 2). 2x>3y, 2x+5y20=0 so 5y20=2x, then 5y20>3y, we can get 2y>20, y>10 put y>10 back into 2x+ 5y 20 =0, x must be <0 suf answer is D. Love your explaination. I almost solved it except that I could not think of this at all(the one in red). You really need to pay close attention to every detail , eh! glad it helps.
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Re: If 2x>3y , is x negative ? 1. y> 0 2. 2x+ 5y 20 =0 [#permalink]
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26 Dec 2017, 06:13
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