It is currently 17 Oct 2017, 15:58

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# xz= xy But what happens when x=0 are we allowed to cancel?

Author Message
Eternal Intern
Joined: 07 Jun 2003
Posts: 464

Kudos [?]: 166 [0], given: 0

Location: Lone Star State
xz= xy But what happens when x=0 are we allowed to cancel? [#permalink]

### Show Tags

30 Jul 2003, 17:07
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

xz= xy

But what happens when x=0 are we allowed to cancel?

This might arise on test day.

VT
_________________

Ride em cowboy

Kudos [?]: 166 [0], given: 0

GMAT Instructor
Joined: 07 Jul 2003
Posts: 769

Kudos [?]: 234 [0], given: 0

Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Re: DS: Can we cancel here? [#permalink]

### Show Tags

30 Jul 2003, 18:18
Curly05 wrote:
xz= xy

But what happens when x=0 are we allowed to cancel?

This might arise on test day.

VT

You cannot divide by zero. Hence if x = 0, you cannot cancel.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

Kudos [?]: 234 [0], given: 0

Manager
Joined: 24 Jun 2003
Posts: 145

Kudos [?]: 3 [0], given: 0

Location: India
Re: DS: Can we cancel here? [#permalink]

### Show Tags

31 Jul 2003, 05:19
Curly05 wrote:
xz= xy

But what happens when x=0 are we allowed to cancel?

This might arise on test day.

VT

Curly, look at it this way:

xz = xy implies xz-xy=0

or x*(z-y) = 0 which means that either x=0 or z-y=0

Therefore, z=y is the unique solution only for non-zero values of x. Therefore, you cannot simply cancel x on both sides in your equation

Kudos [?]: 3 [0], given: 0

Re: DS: Can we cancel here?   [#permalink] 31 Jul 2003, 05:19
Display posts from previous: Sort by