If 1.5/(0.2 + x) = 5, then x =
A) -3.7
B) 0.1
C) 0.3
D) 0.5
E) 2.8
OA: B
If 1.5/(0.2 + x)
This topic has expert replies
-
- Senior | Next Rank: 100 Posts
- Posts: 93
- Joined: Mon Apr 25, 2016 2:22 pm
- Thanked: 1 times
- Followed by:1 members
GMAT/MBA Expert
- Brent@GMATPrepNow
- GMAT Instructor
- Posts: 16207
- Joined: Mon Dec 08, 2008 6:26 pm
- Location: Vancouver, BC
- Thanked: 5254 times
- Followed by:1268 members
- GMAT Score:770
Given: 1.5/(0.2 + x) = 5boomgoesthegmat wrote:If 1.5/(0.2 + x) = 5, then x =
A) -3.7
B) 0.1
C) 0.3
D) 0.5
E) 2.8
Multiply both sides by (0.2 + x) to get: 1.5 = 5(0.2 + x)
Expand: 1.5 = 1 + 5x
Subtract 1 from both sides: 0.5 = 5x
Divide both sides by 5 to get: 0.1 = x
Answer: B
Related Resource
The following video covers the concepts/strategies that are useful for answering this question:
- Eliminating fractions in equations: https://www.gmatprepnow.com/module/gmat ... /video/963
Cheers,
Brent
GMAT/MBA Expert
- Jeff@TargetTestPrep
- GMAT Instructor
- Posts: 1462
- Joined: Thu Apr 09, 2015 9:34 am
- Location: New York, NY
- Thanked: 39 times
- Followed by:22 members
We are given the following equation:boomgoesthegmat wrote:If 1.5/(0.2 + x) = 5, then x =
A) -3.7
B) 0.1
C) 0.3
D) 0.5
E) 2.8
1.5/(0.2+x) = 5
We begin by multiplying both sides of the equation by (0.2 + x), and we obtain:
1.5 = 5(0.2 + x)
1.5 = 1 + 5x
0.5 = 5x
0.5/5 = x
0.1 = x
Answer: B
Jeffrey Miller
Head of GMAT Instruction
[email protected]
See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews
- GMATGuruNY
- GMAT Instructor
- Posts: 15539
- Joined: Tue May 25, 2010 12:04 pm
- Location: New York, NY
- Thanked: 13060 times
- Followed by:1906 members
- GMAT Score:790
To clear the decimals, multiply the top and the bottom of the red fraction by 10:boomgoesthegmat wrote:If 1.5/(0.2 + x) = 5, then x =
A) -3.7
B) 0.1
C) 0.3
D) 0.5
E) 2.8
15/(2 + 10x) = 5.
Since 15/3 = 5, the expression in blue must be equal to 3:
2 + 10x = 3
10x = 1
x = 1/10.
The correct answer is B.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3