Last visit was: 16 Sep 2024, 15:47 It is currently 16 Sep 2024, 15:47
Toolkit
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.
Request Expert Reply

# If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

SORT BY:
Tags:
Show Tags
Hide Tags
Intern
Joined: 07 Aug 2020
Posts: 4
Own Kudos [?]: 15 [1]
Given Kudos: 9
School Moderator - INSEAD Masters
Joined: 07 Jan 2020
Posts: 506
Own Kudos [?]: 267 [1]
Given Kudos: 193
Location: India
GPA: 4
WE:Analyst (Accounting)
GMAT Club Legend
Joined: 03 Oct 2013
Affiliations: CrackVerbal
Posts: 4914
Own Kudos [?]: 7919 [1]
Given Kudos: 221
Location: India
VP
Joined: 28 Jul 2016
Posts: 1197
Own Kudos [?]: 1777 [0]
Given Kudos: 67
Location: India
Concentration: Finance, Human Resources
Schools: ISB '18 (D)
GPA: 3.97
WE:Project Management (Investment Banking)
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink]
BrendaMSL
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15

Usual way .
You have two equations solve for a and b and then subtract the values to get answer .

bt here if you look at equations
you can find that if you subtract 2 from 1 you get a -b
5a + 2b = 11
-(4a + 3b = 4)
=> 5a - 4a +2b-3b = 7
a- b = 7
Hence D is the answer straight

faster
Board of Directors
Joined: 11 Jun 2011
Status:QA & VA Forum Moderator
Posts: 6046
Own Kudos [?]: 4828 [0]
Given Kudos: 463
Location: India
GPA: 3.5
WE:Business Development (Commercial Banking)
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink]
BrendaMSL
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15

5a + 2b = 11
4a + 3b = 4
____________

a - b = 7

Answer must be (D)
Senior Manager
Joined: 01 Mar 2015
Posts: 408
Own Kudos [?]: 951 [0]
Given Kudos: 43
Location: India
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink]
5a + 2b = 11
4a + 3b = 4

Subtracting,
a – b = 7
Hence, OA is (D).
Non-Human User
Joined: 09 Sep 2013
Posts: 34876
Own Kudos [?]: 880 [0]
Given Kudos: 0
Re: If 5a + 2b = 11 and 4a + 3b = 4, then a b = [#permalink]
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: If 5a + 2b = 11 and 4a + 3b = 4, then a b = [#permalink]
Moderator:
Math Expert
95555 posts