Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 22 May 2013, 12:11
Customize  |  Hide

Search
Register
New posts
Unanswered

if xy+z=x(y+z), which of the following must be true? a.

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
User avatar
Joined: 09 Dec 2006
Posts: 99
Followers: 1

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

if xy+z=x(y+z), which of the following must be true? a.  [#permalink] New post 19 Aug 2007, 09:45
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
if xy+z=x(y+z), which of the following must be true?

a. x=0 and z=0
b. x=1 and y=1
c. y=1 and z=0
d. x=1 and y=0
e. x=1 and z=0
Senior Manager
Senior Manager
Joined: 06 Mar 2006
Posts: 498
Followers: 6

Kudos [?]: 48 [0], given: 1

GMAT Tests User
 [#permalink] New post 19 Aug 2007, 09:51
well, xy+z=x(y+z)
xy+z=xy+xz
z-xz=0
z(1-x)=0
z=0; x=1

Answer E
VP
VP
User avatar
Joined: 09 Jul 2007
Posts: 1114
Location: London
Followers: 4

Kudos [?]: 55 [0], given: 0

GMAT Tests User
Re: GMATPREP PS [#permalink] New post 19 Aug 2007, 10:00
Piter wrote:
if xy+z=x(y+z), which of the following must be true?

a. x=0 and z=0
b. x=1 and y=1
c. y=1 and z=0
d. x=1 and y=0
e. x=1 and z=0


It looks complicated, only thing u need is simplifying the equation.
xy+z=x(y+z)
xy+z=xy+xz
xy+z-xy-xz=0
z-xz=0
z(1-x)=0
z=0 and x=1

E
Intern
Intern
Joined: 01 Aug 2007
Posts: 38
Followers: 0

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

 [#permalink] New post 19 Aug 2007, 10:55
I believe this question is worded incorrectly... some of the answer choices should say OR not AND.

But, yes, straight E on this one.
  [#permalink] 19 Aug 2007, 10:55
    Similar topics Author Replies Last post
Similar
Topics:
 New posts If xy+z=x(y+z), which of the following must be true? A) x=0 ellisje22 5 19 Dec 2005, 17:06
New posts If xy+z=x(y+z), which of the following must be true? 1) M8 8 04 Jul 2006, 03:10
New posts If xy+z=x(y+z), which of the following must be true? 1. x=0 marcodonzelli 1 26 Dec 2007, 09:28
Popular new posts 10 EXPERTS_POSTS_IN_THIS_TOPIC If xy+z=x(y+z), which of the following must be true? TomB 16 23 Sep 2010, 13:44
New posts 2 EXPERTS_POSTS_IN_THIS_TOPIC If xy+z=x(y+z), which of the following must be true? WishMasterUA 3 18 Jun 2011, 04:40
Display posts from previous: Sort by

if xy+z=x(y+z), which of the following must be true? a.

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com