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# What is the value of x?

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Manager
Joined: 04 Feb 2011
Posts: 63
Location: US
What is the value of x? [#permalink]

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05 Mar 2011, 06:00
00:00

Difficulty:

15% (low)

Question Stats:

81% (01:27) correct 19% (00:39) wrong based on 135 sessions

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What is the value of x?

(1) – (x + y) = x - y
(2) x + y = 2
[Reveal] Spoiler: OA
Math Forum Moderator
Joined: 20 Dec 2010
Posts: 2010
Re: What is the value of x? [#permalink]

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05 Mar 2011, 06:11
1
This post received
KUDOS
1.
– (x + y) = x - y
-x-y=x-y
-x=x
-2x=0
x=0;
Sufficient.

2. x+y=2
x=2-y.
y unknown. x can't be found.
Not sufficient.

Ans: "A"
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Director
Joined: 01 Feb 2011
Posts: 755
Re: What is the value of x? [#permalink]

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06 Mar 2011, 13:23
1.

-x-y = x-y => x=0

One might think , huh two unknowns one equation , how are we gonna find value of x. On calculation ,we can see x =0.

Sufficient

2. y is needed to solve this one.
Not sufficient.

Hence the answer is A.
Intern
Joined: 03 Apr 2016
Posts: 20
Re: What is the value of x? [#permalink]

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12 May 2016, 03:15
please add the oa its a.
Senior Manager
Status: DONE!
Joined: 05 Sep 2016
Posts: 409
Re: What is the value of x? [#permalink]

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16 Sep 2016, 16:48
A is the correct answer. Here's why:

(1) -(x+y) = x-y
= -x-y = x-y
= -x = x
= 2x = 0 --> x= 0

SUFFICIENT

(2) x+y = 2

NOT SUFFICIENT
Re: What is the value of x?   [#permalink] 16 Sep 2016, 16:48
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# What is the value of x?

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