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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. # If 12x + 2y is 80% of 5y, what is the value  Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS: GRE Instructor Joined: 10 Apr 2015
Posts: 3838
Followers: 149

Kudos [?]: 4499  , given: 69

If 12x + 2y is 80% of 5y, what is the value [#permalink]
2
KUDOS
Expert's post 00:00

Question Stats: 85% (01:01) correct 14% (01:21) wrong based on 48 sessions
If 12x + 2y is 80% of 5y, what is the value of x/y ?

A) 1/6
B) 1/4
C) 2/5
D) 1/2
E) 5/8
[Reveal] Spoiler: OA

_________________

Brent Hanneson – Creator of greenlighttestprep.com
If you enjoy my solutions, you'll like my GRE prep course. GRE Instructor Joined: 10 Apr 2015
Posts: 3838
Followers: 149

Kudos [?]: 4499 , given: 69

Re: If 12x + 2y is 80% of 5y, what is the value [#permalink]
Expert's post
GreenlightTestPrep wrote:
If 12x + 2y is 80% of 5y, what is the value of x/y ?

A) 1/6
B) 1/4
C) 2/5
D) 1/2
E) 5/8

GIVEN: 12x + 2y is 80% of 5y
Rewrite as: 12x + 2y = (80/100)(5y)
Evaluate to get: 12x + 2y = 4y
Subtract 2y from both sides of the equation to get: 12x = 2y
Divide both sides by y to get: 12x/y = 2
Divide both sides by 12 to get: x/y = 2/12
Simplify: x/y = 1/6

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com
If you enjoy my solutions, you'll like my GRE prep course. Manager Joined: 29 Nov 2017
Posts: 190
Location: United States
GRE 1: Q142 V146 WE: Information Technology (Computer Software)
Followers: 1

Kudos [?]: 94 , given: 99

Re: If 12x + 2y is 80% of 5y, what is the value [#permalink]
GreenlightTestPrep wrote:
GreenlightTestPrep wrote:
If 12x + 2y is 80% of 5y, what is the value of x/y ?

A) 1/6
B) 1/4
C) 2/5
D) 1/2
E) 5/8

GIVEN: 12x + 2y is 80% of 5y
Rewrite as: 12x + 2y = (80/100)(5y)
Evaluate to get: 12x + 2y = 4y
Subtract 2y from both sides of the equation to get: 12x = 2y
Divide both sides by y to get: 12x/y = 2
Divide both sides by 12 to get: x/y = 2/12

Simplify: x/y = 1/6

Cheers,
Brent

Brent I am unable to understand the highlighted , pls elucidate.
GRE Instructor Joined: 10 Apr 2015
Posts: 3838
Followers: 149

Kudos [?]: 4499 , given: 69

Re: If 12x + 2y is 80% of 5y, what is the value [#permalink]
Expert's post
IshanGre wrote:
GreenlightTestPrep wrote:
GreenlightTestPrep wrote:
If 12x + 2y is 80% of 5y, what is the value of x/y ?

A) 1/6
B) 1/4
C) 2/5
D) 1/2
E) 5/8

GIVEN: 12x + 2y is 80% of 5y
Rewrite as: 12x + 2y = (80/100)(5y)
Evaluate to get: 12x + 2y = 4y
Subtract 2y from both sides of the equation to get: 12x = 2y
Divide both sides by y to get: 12x/y = 2
Divide both sides by 12 to get: x/y = 2/12

Simplify: x/y = 1/6

Cheers,
Brent

Brent I am unable to understand the highlighted , pls elucidate.

Once we know that 12x = 2y, we must determine the value of x/y
To do so, we must follow the Golden Rule of Equation Solving: what you do to one side of the equation, you must do to the other side.

So, to move the y to the left side of the equation, I took 12x = 2y and divided BOTH sides by y to get: 12x/y = 2
To move the 12 to the left side, I took 12x/y = 2 and divided BOTH sides by 12 to get: x/y = 2/12

Does that help?

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com
If you enjoy my solutions, you'll like my GRE prep course. Manager Joined: 29 Nov 2017
Posts: 190
Location: United States
GRE 1: Q142 V146 WE: Information Technology (Computer Software)
Followers: 1

Kudos [?]: 94 , given: 99

Re: If 12x + 2y is 80% of 5y, what is the value [#permalink]
Thanks a lot Brent. Re: If 12x + 2y is 80% of 5y, what is the value   [#permalink] 03 Jun 2018, 18:47
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