BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

What is the value of x?

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

What is the value of x?

by sanju09 » Wed Sep 15, 2010 3:13 am
What is the value of x?

[1] 3 (x - 1) = y + 3 x.

[2] (x + 2) (y + 3) = 0.



[spoiler]Source: https://readyforgmat.com[/spoiler]
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 47
Joined: Wed Sep 03, 2008 11:18 pm
Thanked: 5 times
Followed by:1 members

by top_business_2011 » Wed Sep 15, 2010 9:04 am
sanju09 wrote:What is the value of x?

[1] 3 (x - 1) = y + 3 x.

[2] (x + 2) (y + 3) = 0.

1] 3X - 3= Y+ 3X
Here, since 3x can be cancelled out, you will be left with Y=-3; therefore, you cannot get the value of X.
2] For the equation to be correct, either X+2=0 or Y+ 3= 0.
It follows from the above that X=-2 or Y= -3; thus insufficient because to satisfy the equation, X can assume any value insofar as Y= -3
Taking both data together asserts that Y has to be exactly -3, thus leaving wide room for X to assume any number. Had the given information in number 1 resulted in a 'Y-value' different from -3, then Choice C would have been the answer. But in this case the answer is E.


[spoiler]Source: https://readyforgmat.com[/spoiler]
Top
User avatar
Legendary Member
Posts: 659
Joined: Mon Dec 14, 2009 8:12 am
Thanked: 32 times
Followed by:3 members

by Gurpinder » Wed Sep 15, 2010 9:50 am
sanju09 wrote:What is the value of x?

[1] 3 (x - 1) = y + 3 x.

[2] (x + 2) (y + 3) = 0.
(1) --> -3=y
(2) --> xy+3x+2y+6=0


you would think that together you'll be able to solve but you can't.
the entire eq. just = 0. we cannot get the value of x.

hence (E).
"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
Top
Post new topic Post Reply
• Page 1 of 1