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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.  # Is x > 9? (1) x^2 + 3x = 28 (2) 9x = 5x − 28

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Math Expert V
Joined: 02 Sep 2009
Posts: 59561
Is x > 9? (1) x^2 + 3x = 28 (2) 9x = 5x − 28  [#permalink]

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Difficulty:   35% (medium)

Question Stats: 78% (01:09) correct 22% (01:19) wrong based on 81 sessions

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Is x > 9?

(1) x^2 + 3x = 28
(2) 9x = 5x − 28
Retired Moderator V
Joined: 28 Mar 2017
Posts: 1192
Location: India
GMAT 1: 730 Q49 V41 GPA: 4
Re: Is x > 9? (1) x^2 + 3x = 28 (2) 9x = 5x − 28  [#permalink]

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Bunuel wrote:
Is x > 9?

(1) x^2 + 3x = 28
(2) 9x = 5x − 28

Statement 1:
(x+7)(x-4)=0
x=-7 / 4 --Sufficient

Statement 2:
4x=-28
x=-7 --Sufficient

Intern  B
Joined: 09 Jan 2014
Posts: 13
Location: India
GMAT 1: 690 Q48 V37 GMAT 2: 730 Q50 V39 GPA: 4
WE: General Management (Manufacturing)
Re: Is x > 9? (1) x^2 + 3x = 28 (2) 9x = 5x − 28  [#permalink]

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Bunuel wrote:
Is x > 9?

(1) x^2 + 3x = 28
(2) 9x = 5x − 28

Is x> 9

1)
x^2 + 3x = 28
x^2+3x-28 = 0
x^2+7x-4x-28=0
(x+7)(x-4)=0
x = -7 or 4
Both the values of x less than 9, hence statement 1 is sufficient.

2)
9x = 5x - 28
4x = -28
x = -7
-7 < 9, Hence statement 2 is sufficient.

Option D should be the answer.
Intern  B
Joined: 23 May 2015
Posts: 24
Re: Is x > 9? (1) x^2 + 3x = 28 (2) 9x = 5x − 28  [#permalink]

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Bunuel wrote:
Is x > 9?

(1) x^2 + 3x = 28
(2) 9x = 5x − 28

Statement 1:
x^2+3x-28=0
X=4,-7
Both are less than 9
Sufficient

Statement 2:
9x=5x-28
4x=-28
X=-7
Sufficient

Ans: D

To win the Game , Be in the Game Re: Is x > 9? (1) x^2 + 3x = 28 (2) 9x = 5x − 28   [#permalink] 27 Feb 2018, 23:24
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