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If |x – 3| = 5, what is the value of x?

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If |x – 3| = 5, what is the value of x? [#permalink]

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New post 03 Nov 2016, 01:22
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Question Stats:

83% (00:34) correct 18% (00:41) wrong based on 187 sessions

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Manager
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 03 Nov 2016, 01:42
x>3. x = 8
x<3, x = -2

(1) x < 0

=>x =- 2


(2) x^3 = –8
=> x <0

x = -2

Both choice are sufficient.
Option D
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 03 Nov 2016, 01:46
lx-3l=5

So basically, we have to know whether the value inside the absolute is positive or negative, that is, we have to know if x-3>0 or x-3<0. So knowing the range of possible value of x would be sufficient.

Statement1: x<0, so x if for sure less than 3, so lx-3l=3-x (to make the value inside the absolute positive)=5 =>x=-2 => sufficient

Statement2: x^3=-8, so x=-2 => sufficient

Answer is D. Both statements are sufficient
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 03 Nov 2016, 01:53
Bunuel wrote:
If |x – 3| = 5, what is the value of x?

(1) x < 0
(2) x^3 = –8


IMO D
Given
x-3=5 when x>0 ==> x=8
3-x=5 when x<0 ==> x=-2
what is the value of x?

statement 1
says that x<0 giving the value of x as -2
Sufficient

Statement 2
x^3=-8 ==> x=-2
Sufficient

Hence D
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 03 Nov 2016, 07:34
Bunuel wrote:
If |x – 3| = 5, what is the value of x?

(1) x < 0
(2) x^3 = –8


from the given statement, x is either -2 or 8.

1. x<0 -> x must be -2. sufficient.
2. x^3 = -8, x must be -2. sufficient.

answer is D.
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 03 Nov 2016, 21:19
Bunuel wrote:
If |x – 3| = 5, what is the value of x?

(1) x < 0
(2) x^3 = –8



Question : What is the value of x?
Given, |x – 3| = 5
i.e. x = 8 or -2

Statement 1:: x < 0
i.e. x must be only -2, Hence
SUFFICIENT

Statement 2:: x^3 = –8
i.e. x must be only -2 out of 8 or -2, Hence
SUFFICIENT


Answer: option D
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 04 Nov 2016, 11:11
I'm sorry to ask, but are these questions actually 600-700 level? Seem to easy.

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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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gillyelephant wrote:
I'm sorry to ask, but are these questions actually 600-700 level? Seem to easy.

Posted from my mobile device



Yes this question is 600-700 level questions due to the following facts

1) This question is a DS question
2) Question requires the properties of Inequality and Absolute value which is supposed to be a difficult topic
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 04 Jan 2017, 10:49
gillyelephant wrote:
I'm sorry to ask, but are these questions actually 600-700 level? Seem to easy.

Posted from my mobile device


Lol i agree, this was very easy but you will be surprised how many people would select C. Its a C trap answer. Under test conditions with stress, many people will carry over the -2 vs 8 mindset, and see X cube is -8 and quickly select C and move on.
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Re: If |x – 3| = 5, what is the value of x? [#permalink]

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New post 01 Sep 2017, 13:50
Bunuel wrote:
If |x – 3| = 5, what is the value of x?

(1) x < 0
(2) x^3 = –8


2 ways to approach absolute value

Pos

x-3 =5
x =8

Neg

-l x -3l =5
-x + 3 =5
-x = 2
x= -2

D
Re: If |x – 3| = 5, what is the value of x?   [#permalink] 01 Sep 2017, 13:50
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If |x – 3| = 5, what is the value of x?

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