GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 18 Feb 2020, 04:34

### 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

# 3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y A. 20 B. 18

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 61274
3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y A. 20 B. 18  [#permalink]

### Show Tags

13 May 2016, 04:12
00:00

Difficulty:

5% (low)

Question Stats:

92% (01:25) correct 8% (01:19) wrong based on 119 sessions

### HideShow timer Statistics

3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y

A. 20
B. 18
C. 11
D. 10
E. 5

_________________
Senior Manager
Joined: 31 Mar 2016
Posts: 372
Location: India
Concentration: Operations, Finance
GMAT 1: 670 Q48 V34
GPA: 3.8
WE: Operations (Commercial Banking)
Re: 3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y A. 20 B. 18  [#permalink]

### Show Tags

13 May 2016, 05:08
1
Line up equations and solve as linear by multiplying either of them by 3:

3x+y = 9 X 3
3x+3y=1
............
Subtracing we get 8x =56 hence x=7. substituting we get y= -2. Hence 2x + 2y = 2(7) +2(-2) = 14-4 = 10. Answer is D
Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 4844
Location: India
GPA: 3.5
Re: 3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y A. 20 B. 18  [#permalink]

### Show Tags

13 May 2016, 09:25
2
Bunuel wrote:
3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y

A. 20
B. 18
C. 11
D. 10
E. 5

Quote:
3x + y = 19 , and x + 3y = 1

4x + 4y = 20

Divide by 2 ( to Get 2x + 2y)

_________________
Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )
Non-Human User
Joined: 09 Sep 2013
Posts: 14075
Re: 3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y A. 20 B. 18  [#permalink]

### Show Tags

28 Nov 2019, 06:30
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: 3x + y = 19 , and x + 3y = 1. Find the value of 2x + 2y A. 20 B. 18   [#permalink] 28 Nov 2019, 06:30
Display posts from previous: Sort by