GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

It is currently 06 Jul 2020, 19:01

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.

Close

Request Expert Reply

Confirm Cancel

If x is a real number such that x-7√x+4=14, what is the value of x?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Manager
Manager
User avatar
G
Joined: 24 Feb 2020
Posts: 165
Location: Italy
WE: Analyst (Investment Banking)
If x is a real number such that x-7√x+4=14, what is the value of x?  [#permalink]

Show Tags

New post 17 Apr 2020, 11:05
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

84% (01:56) correct 16% (01:12) wrong based on 25 sessions

HideShow timer Statistics

If x is a real number such that \(x-7\sqrt{x+4}=14\), what is the value of x?

(A) 77
(B) 80
(C) 83
(D) 86
(E) 89
DS Forum Moderator
User avatar
V
Joined: 19 Oct 2018
Posts: 1985
Location: India
Premium Member
Re: If x is a real number such that x-7√x+4=14, what is the value of x?  [#permalink]

Show Tags

New post 17 Apr 2020, 11:28
x-14 = \(7\sqrt{x+4}\)

All the options are integer, then \(7\sqrt{x+4}\) must be an integer.

Only 77+4 is a perfect square.

Ravixxx wrote:
If x is a real number such that \(x-7\sqrt{x+4}=14\), what is the value of x?

(A) 77
(B) 80
(C) 83
(D) 86
(E) 89
GMAT Club Bot
Re: If x is a real number such that x-7√x+4=14, what is the value of x?   [#permalink] 17 Apr 2020, 11:28

If x is a real number such that x-7√x+4=14, what is the value of x?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne