GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 14 Dec 2018, 21:22

### 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 December
PrevNext
SuMoTuWeThFrSa
2526272829301
2345678
9101112131415
16171819202122
23242526272829
303112345
Open Detailed Calendar
• ### Typical Day of a UCLA MBA Student - Recording of Webinar with UCLA Adcom and Student

December 14, 2018

December 14, 2018

10:00 PM PST

11:00 PM PST

Carolyn and Brett - nicely explained what is the typical day of a UCLA student. I am posting below recording of the webinar for those who could't attend this session.
• ### Why Do YOU Need an MBA?

December 14, 2018

December 14, 2018

10:00 PM PST

11:00 PM PST

Download Why MBA and learn how to determine your MBA goals and weave them into a compelling essay!

# How can I solve this simultaneously?

Author Message
Manager
Joined: 07 Jun 2018
Posts: 110
How can I solve this simultaneously?  [#permalink]

### Show Tags

26 Jul 2018, 05:26
The question says:
Solve the following simultaneously:

1.) 3x-y+12 = 5x+2y+4 = x-y

Thanks a lot!

Posted from my mobile device
MBA Section Director
Affiliations: GMATClub
Joined: 22 May 2017
Posts: 1472
Concentration: Nonprofit
GPA: 4
WE: Engineering (Computer Software)
Re: How can I solve this simultaneously?  [#permalink]

### Show Tags

26 Jul 2018, 05:37
1
I am not sure what you meant by simultaneously but here is how I would solve it.

3x-y+12 = 5x+2y+4 = x-y

=> 3x-x-y+y+12 = 5x-x+2y+y+4 = 0

=> 2x+12 = 4x+3y+4 = 0

=> 2x+12 = 0 and 4x+3y+4 = 0

=> x = -6 and -24+3y+4 = 0

=> x = -6 and 3y-20 = 0

=> x = -6 and y = $$\frac{20}{3}$$
_________________
Manager
Joined: 07 Jun 2018
Posts: 110
Re: How can I solve this simultaneously?  [#permalink]

### Show Tags

26 Jul 2018, 07:34
Thank you very much!

Posted from my mobile device
Re: How can I solve this simultaneously? &nbs [#permalink] 26 Jul 2018, 07:34
Display posts from previous: Sort by