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If y is positive, what is the value of x ?

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V
Joined: 02 Sep 2009
Posts: 41873

Kudos [?]: 128601 [0], given: 12180

If y is positive, what is the value of x ? [#permalink]

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New post 17 Sep 2017, 05:24
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

63% (00:57) correct 38% (01:26) wrong based on 40 sessions

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Kudos [?]: 128601 [0], given: 12180

Manager
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Joined: 02 Nov 2015
Posts: 176

Kudos [?]: 22 [0], given: 121

GMAT 1: 640 Q49 V29
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Re: If y is positive, what is the value of x ? [#permalink]

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New post 17 Sep 2017, 05:51
Statement 1:
Since Y is positive , so x-y= -x-y
This solves to 2x=0.
Leading to x=0..
So sufficient.

Statement 2: tells nothing about x or Y..

So A is the answer.

Note:. Kindly point out if any fault is here in my understanding.
Thank you.

Sent from my Lenovo TAB S8-50LC using GMAT Club Forum mobile app

Kudos [?]: 22 [0], given: 121

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Joined: 10 Jan 2016
Posts: 85

Kudos [?]: 17 [0], given: 1196

Location: India
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GMAT 1: 620 Q47 V29
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Re: If y is positive, what is the value of x ? [#permalink]

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New post 17 Sep 2017, 06:15
I think option A is sufficient. By looking at the question, we can say that mod y is equal to y as y is +ve.
Thus we get A as sufficient

Kudos if you like my answer

Kudos [?]: 17 [0], given: 1196

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Kudos [?]: 10 [0], given: 85

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Re: If y is positive, what is the value of x ? [#permalink]

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New post 17 Sep 2017, 07:10
Bunuel wrote:
If y is positive, what is the value of x ?

(1) x - y = -(x + |y|)
(2) x - y = -3


Stmt 1 x-y=-(x+|y|)
Given y is positive , so x-y= -(x+y)
so x-y= -x-y
which implies x=0; Definite Answer so Sufficient.

Stmnt gives x=y-3. Since we only know y is +ve and no definite value of y, Insufficient.

Hence Ans:A

Kudos [?]: 10 [0], given: 85

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Kudos [?]: 5 [0], given: 2

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Re: If y is positive, what is the value of x ? [#permalink]

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New post 18 Sep 2017, 10:50
From statement 1

x-y= -x -y (As y is positive so |y|=y)

therefore x=0;

In statement 2 we have 2 unknown variable and only on equation so it in sufficient

So the answer is A

Kudos [?]: 5 [0], given: 2

Re: If y is positive, what is the value of x ?   [#permalink] 18 Sep 2017, 10:50
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