It is currently 15 Sep 2026, 17:03
Home
Messages
Tests
Schools
Events
Close
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
Your Progress

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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
Bunuel
User avatar
Math Expert
Joined: 02 Sep 2009
Last visit: 15 Sep 2026
Posts: 113,555
Products:
GMAT Club Tests
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 113,555
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
23 Feb 2017, 05:30
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
Official Answer and Stats are available only to registered users. Register/Login.
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

87% (00:49) correct 13% (00:59) wrong based on 286 sessions

History

Date
Time
Result
Not Attempted Yet
x=1−2y, and 5x+10y+z=5. What is the value of z?

A. -5
B. 0
C. 5
D. 10
E. The answer cannot be determined from the data provided.
ShowHide Answer
Official Answer
Official Answer and Stats are available only to registered users. Register/Login.

_________________
New to the GMAT Club?
Signature Read More
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
Most Helpful Reply
User avatar
BrentGMATPrepNow
User avatar
Major Poster
Joined: 11 Sep 2015
Last visit: 31 Oct 2025
Posts: 6,727
Location: Canada
Expert
Expert reply
Posts: 6,727
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
23 Feb 2017, 08:20
Bunuel
x = 1 - 2y, and 5x + 10y + z = 5. What is the value of z?

A. -5
B. 0
C. 5
D. 10
E. The answer cannot be determined from the data provided.
Show more

Given: x = 1 - 2y
Add 2y to both sides to get: x + 2y = 1

Given: 5x + 10y + z = 5
Notice that we have x + 2y "hiding" in this expression.
Rewrite the first two terms as follows: 5(x + 2y) + z = 5
Replace x + 2y with 1 to get: 5(1) + z = 5
Simplify: 5 + z = 5
Solve: z = 0

Cheers,
Brent
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
General Discussion
User avatar
deepthit
User avatar
Joined: 24 Oct 2013
Last visit: 29 Apr 2023
Posts: 104
Location: India
Concentration: General Management, Strategy
WE:Information Technology (Computer Software)
Posts: 104
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
23 Feb 2017, 05:36
z = 5 - 5x - 10y
substitute x = 1-2y in the above equation.

z = 5-5+10y-10Y = 0
Option B
Kudos
Add Kudos
Bookmarks
Bookmark this Post
avatar
JeevesAsk
avatar
Joined: 29 Nov 2016
Last visit: 22 Jul 2017
Posts: 14
Schools: DeGroote
Schools: DeGroote
Posts: 14
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
23 Feb 2017, 05:38
By setting z= 0, i re-arranged
5x+10y+0=5
5x=5-10y
X= 1-2y which is equal to the 1st equation.

Answer B
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
Abhishek009
User avatar
Board of Directors
Joined: 11 Jun 2011
Last visit: 17 Dec 2025
Posts: 5,878
Status:QA & VA Forum Moderator
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Posts: 5,878
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
23 Feb 2017, 07:57
Bunuel
x = 1 − 2y, and 5x+10y+z=5. What is the value of z?

A. -5
B. 0
C. 5
D. 10
E. The answer cannot be determined from the data provided.
Show more

\(5x + 10y + z = 5\)

Substitute, \(x = 1 − 2y\) in the equation -

Or, \(5 ( 1 − 2y ) + 10y + z = 5\)

Or, \(5 − 10y + 10y + z = 5\)

Or, \(z = 0\)

Hence, z = 0, answer will be (B) 0

_________________
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 )
Signature Read More
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
NandishSS
User avatar
Joined: 06 Jan 2015
Last visit: 28 Jan 2021
Posts: 700
Location: India
Concentration: Operations, Finance
GPA: 3.35
WE:Information Technology (Computer Software)
Posts: 700
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
 Updated on: 27 Feb 2017, 17:24
Originally posted by NandishSS on 23 Feb 2017, 09:21.
Last edited by NandishSS on 27 Feb 2017, 17:24, edited 1 time in total.
Bunuel
x=1−2y, and 5x+10y+z=5. What is the value of z?

A. -5
B. 0
C. 5
D. 10
E. The answer cannot be determined from the data provided.
Show more

Hi,

Easy Question :-)

x=1−2y, and 5x+10y+z=5

Sunstitute x=1-2y==>5(1-2y)+10y+z=5==>5-10y+10y+z=5

z=0

B

Typo Edited
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
ScottTargetTestPrep
User avatar
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 15 Sep 2026
Posts: 22,740
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert
Expert reply
Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
Posts: 22,740
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
27 Feb 2017, 10:49
Bunuel
x=1−2y, and 5x+10y+z=5. What is the value of z?

A. -5
B. 0
C. 5
D. 10
E. The answer cannot be determined from the data provided.
Show more


We are given that x = 1 − 2y and 5x + 10y + z = 5.

We can substitute 1 − 2y for x in the equation 5x + 10y + z = 5:

5(1 - 2y) + 10y + z = 5

5 -10y + 10y + z = 5

5 + z = 5

z = 0

Answer: B

_________________
See why Target Test Prep is the top rated GMAT course on GMAT Club. Read Our Reviews
Signature Read More
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 39,226
Posts: 39,226
x=1−2y, and 5x+10y+z=5. What is the value of z?
Post URL
22 Jun 2024, 18:20
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.

_________________

Solving this question helps. Taking a timed set of similar questions in GMAT Club Forum Quiz → is even better.

Signature Read More
Kudos
Add Kudos
Bookmarks
Bookmark this Post
NEW TOPIC
POST REPLY
Downloads
My Bookmarks
Reviews
Moderator:
Bunuel
Math Expert
113555 posts