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# Is |x|=y-z?

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Senior Manager
Status: 750+ or Burst !
Joined: 01 May 2011
Posts: 361
Location: India
Concentration: General Management, Strategy
GMAT 1: 670 Q48 V35
GPA: 3.5

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27 Jun 2011, 20:19
1
00:00

Difficulty:

25% (medium)

Question Stats:

69% (01:02) correct 31% (01:10) wrong based on 68 sessions

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Is $$|x|=y-z$$ ?

(1) $$x+y=z$$
(2) $$x<0$$

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Current Student
Joined: 26 May 2005
Posts: 508
Re: Is |x|=y-z?  [#permalink]

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27 Jun 2011, 20:32
1
2
akhileshgupta05 wrote:
is $$|x|=y-z$$ ?

(1)$$x+y=z$$
(2)$$x<0$$

|X|= y-z means;
X>0; X= Y-Z
X<0; -X= Y-Z ; X= Z-Y

St1: X= Z-Y We dont know if X>0 or <0 ............ insufficient

St2: X<0 ; when dont know about Y and Z ......... insufficient

1&2 : we know X<0 and X= Z-Y hence sufficient
Director
Joined: 01 Feb 2011
Posts: 664
Re: Is |x|=y-z?  [#permalink]

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27 Jun 2011, 20:39
is |x| = y-z?

1. Not sufficient

x+y =z
=> y-z = -x

if x<0 y-z = |x|

if x>=0 y-z = -|x|

2. Not sufficient
x<0
we dont know anything about y or z or their relation to x.

together

Sufficient , as y-z = |x|

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Joined: 09 Sep 2013
Posts: 8812
Re: Is |x|=y-z?  [#permalink]

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09 Nov 2017, 23:40
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Is |x|=y-z? &nbs [#permalink] 09 Nov 2017, 23:40
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# Is |x|=y-z?

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