It is currently 22 Jan 2018, 04:36

### 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

# If y = 3x, and z = 2y, then in terms of x, x + y + z =

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 43363
If y = 3x, and z = 2y, then in terms of x, x + y + z = [#permalink]

### Show Tags

09 Aug 2017, 03:38
2
KUDOS
Expert's post
2
This post was
BOOKMARKED
00:00

Difficulty:

5% (low)

Question Stats:

95% (00:36) correct 5% (00:15) wrong based on 72 sessions

### HideShow timer Statistics

If y = 3x, and z = 2y, then in terms of x, x + y + z =

(A) 10x
(B) 9x
(C) 8x
(E) 6x
(E) 5x
[Reveal] Spoiler: OA

_________________
BSchool Forum Moderator
Joined: 26 Feb 2016
Posts: 1816
Location: India
WE: Sales (Retail)
Re: If y = 3x, and z = 2y, then in terms of x, x + y + z = [#permalink]

### Show Tags

09 Aug 2017, 03:57
1
KUDOS
Given data:
y = 3x
z = 2y

Therefore, z can be rewritten as 2(3x) = 6x

Since we need to find the value of the expression in terms of x,

x + y + z = x + 3x + 6x = 10x(Option A)
_________________

Stay hungry, Stay foolish

Board of Directors
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 3253
Location: India
GPA: 3.5
Re: If y = 3x, and z = 2y, then in terms of x, x + y + z = [#permalink]

### Show Tags

09 Aug 2017, 07:57
Bunuel wrote:
If y = 3x, and z = 2y, then in terms of x, x + y + z =

(A) 10x
(B) 9x
(C) 8x
(E) 6x
(E) 5x

Let x = 1

So, y = 3 & z = 6

Hence, $$x + y + z$$ = $$1 + 6 + 3$$ = $$10$$

Thus, in terms of x the value of $$x + y + z$$ = $$10$$

Hence, answer must be (A) $$10x$$
_________________

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 )

Intern
Joined: 12 Aug 2017
Posts: 3
GMAT 1: 730 Q45 V45
GMAT 2: 710 Q48 V40
GMAT 3: 720 Q44 V45
Re: If y = 3x, and z = 2y, then in terms of x, x + y + z = [#permalink]

### Show Tags

15 Aug 2017, 10:45
z = 2y
y = 3x
so z = 2(3x) = 6x

x + 3x + 6x = 10x
Manhattan Prep Instructor
Joined: 04 Dec 2015
Posts: 458
GMAT 1: 790 Q51 V49
GRE 1: 340 Q170 V170
Re: If y = 3x, and z = 2y, then in terms of x, x + y + z = [#permalink]

### Show Tags

15 Aug 2017, 13:06
1
KUDOS
Expert's post
Bunuel wrote:
If y = 3x, and z = 2y, then in terms of x, x + y + z =

(A) 10x
(B) 9x
(C) 8x
(E) 6x
(E) 5x

Variables in the answer choices tell you to choose your own values! The phrase 'in terms of' is another clue that this will work.

Let's say x = 1.

Then y = 3 and z = 6.

x + y + z = 1 + 3 + 6 = 10.

Plug x into the answer choices to see which one equals 10. In this case it's A.
_________________

Chelsey Cooley | Manhattan Prep Instructor | Seattle and Online

My upcoming GMAT trial classes | GMAT blog archive

Senior Manager
Joined: 04 Sep 2015
Posts: 479
Location: India
WE: Information Technology (Computer Software)
Re: If y = 3x, and z = 2y, then in terms of x, x + y + z = [#permalink]

### Show Tags

22 Aug 2017, 10:21
If y = 3x, and z = 2y, then in terms of x, x + y + z =

(A) 10x
(B) 9x
(C) 8x
(E) 6x
(E) 5x

Just substitute the values into the last equation

x+3x+6x=10x,option A
Re: If y = 3x, and z = 2y, then in terms of x, x + y + z =   [#permalink] 22 Aug 2017, 10:21
Display posts from previous: Sort by