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If 2x − y = 10 and x/y = 3, then x =

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Joined: 20 May 2014
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If 2x − y = 10 and x/y = 3, then x = [#permalink] New post 20 Nov 2017, 11:09
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Question Stats:

100% (00:50) correct 0% (00:00) wrong based on 3 sessions
If 2x − y = 10 and x/y = 3, then x =

A. −10
B. 2
C. 4
D. 6
E. 12


Kudos for correct solution.
[Reveal] Spoiler: OA
GRE Instructor
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Joined: 10 Apr 2015
Posts: 1244
Followers: 46

Kudos [?]: 1135 [0], given: 7

Re: If 2x − y = 10 and x/y = 3, then x = [#permalink] New post 24 Nov 2018, 15:51
Expert's post
Bunuel wrote:
If 2x − y = 10 and x/y = 3, then x =

A. −10
B. 2
C. 4
D. 6
E. 12


Kudos for correct solution.


GIVEN: x/y = 3
Multiply both sides by y to get: x = 3y

GIVEN: 2x − y = 10
Replace x with 3y to get: 2(3y) - y = 10
Simplify: 6y - y = 10
Simplify: 5y = 10
Solve: y = 2

We need to find the value of x
Take x/y = 3 and replace y with 2 to get: x/2 = 3
Solve: x = 6

Answer: D

Cheers,
Brent
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Brent Hanneson – Creator of greenlighttestprep.com
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Re: If 2x − y = 10 and x/y = 3, then x =   [#permalink] 24 Nov 2018, 15:51
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