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

Redeem

General question

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Legendary Member
Posts: 876
Joined: Thu Apr 10, 2008 8:14 am
Thanked: 13 times

General question

by ketkoag » Wed Apr 01, 2009 11:35 am
Is │x│=│y│?
(1) x -y = 6
(2) x +y = 0

Here i took statement 2 and put x = -y in the equation │x│=│y│ and thus solved it. Is there any other method to do that??
OA: B
Top
Source: — Data Sufficiency |
Senior | Next Rank: 100 Posts
Posts: 33
Joined: Thu Feb 19, 2009 7:19 pm
Location: DC
Thanked: 2 times

Re: General question

by iwant700plus » Wed Apr 01, 2009 11:40 am
Pick #s.

(2) x+y=0 -->x=-y
x=4, y=-4 |x=|y|

Because x=-y nomatter what x is positive or negative |x|=|y|
ketkoag wrote:Is │x│=│y│?
(1) x -y = 6
(2) x +y = 0

Here i took statement 2 and put x = -y in the equation │x│=│y│ and thus solved it. Is there any other method to do that??
OA: B
Top
Master | Next Rank: 500 Posts
Posts: 116
Joined: Tue Mar 31, 2009 10:50 am
Followed by:1 members

by LulaBrazilia » Wed Apr 01, 2009 10:27 pm
If we add the two equations, we get x = 6. If we put that back into equation (1) we get 6-y=0 -> y=0. however if we put it back into equation (2) we get 6+y=0 -> y=-6.


What am I missing?
Top
Post new topic Post Reply
• Page 1 of 1