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# Is x > y? (1) 9x = 4 y (2) x > – y

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Joined: 02 Sep 2009
Posts: 58312
Is x > y? (1) 9x = 4 y (2) x > – y  [#permalink]

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20 Dec 2015, 05:41
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Difficulty:

65% (hard)

Question Stats:

51% (01:52) correct 49% (01:39) wrong based on 103 sessions

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Is x > y?

(1) 9x = 4y

(2) x > – y

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Re: Is x > y? (1) 9x = 4 y (2) x > – y  [#permalink]

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21 Dec 2015, 05:00
2
(1) 9x = 4y
=> x = (4/9)y
If x = 4 then y = 9
if x = -4 then y = -9

Not sufficient

(2) x > – y
=>x + y > 0

Not sufficient

Combining 1 and 2 , we get
Sufficient

Answer C
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Re: Is x > y? (1) 9x = 4 y (2) x > – y  [#permalink]

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21 Dec 2015, 07:41
(1) 9x = 4y
x=4,-4 and y=9,-9...Insuff

(2) x > – y
4>-2 so 4>2 ... also 4>-5 so 4<-5 ...Insuff

Combining both

4>-9 or x is not greater than y.. suff

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Re: Is x > y? (1) 9x = 4 y (2) x > – y  [#permalink]

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10 Apr 2019, 14:54
Is x>y?

Plugging in values:

1) 9x=4y
9(4) = 4(9) ✔
9(0) = 4(0) ✘
Depends on values, not sufficient.

2) x > -y
4 > -9 ✘ doesn't fulfill x>y
9 > -4 ✔ fits both
So it depends on the values again, not sufficient.

3) Take the first example in 1) 9(4) = 4(9) and 2) 4>-9 ... we can definitely say x NOT > y, sufficient.
Re: Is x > y? (1) 9x = 4 y (2) x > – y   [#permalink] 10 Apr 2019, 14:54
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# Is x > y? (1) 9x = 4 y (2) x > – y

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