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If 1 + 1/x = 2 - 2/x, then x =

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If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 20 Dec 2012, 08:34
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If 1 + 1/x = 2 - 2/x, then x =

(A) -1
(B) 1/3
(C) 2/3
(D) 2
(E) 3
[Reveal] Spoiler: OA
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 20 Dec 2012, 08:36
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 21 Dec 2012, 03:14
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Ans:

1+1/x=2-2/x, getting x on one side, 1/x+2/x=2-1, 3/x=1, x=3

Therefore answer is (E).
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 11 Feb 2013, 08:57
Am I the only one, who does not understand why this questions is rated in OG12 as Hard? I guess I still am not a Quant-Killer, but this question seems to be quite simple and straightforward.

Thanks!
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 11 Feb 2013, 09:00
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bgpower wrote:
Am I the only one, who does not understand why this questions is rated in OG12 as Hard? I guess I still am not a Quant-Killer, but this question seems to be quite simple and straightforward.

Thanks!


I agree with you. From my point of view this questions is sub-600 level.
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 24 Jul 2013, 14:32
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To add to your point, I've noticed that in the last pages of the OG hidden among the 700+ level questions are some really easy 600 or less level questions. Anyone know why that is the case? The guide states that the questions are organized by difficulty yet in the last 40 questions, the guide has some very very easy questions.
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 12 Nov 2013, 05:55
Bunuel wrote:
Walkabout wrote:
If 1 + 1/x = 2 - 2/x, then x =

(A) -1
(B) 1/3
(C) 2/3
(D) 2
(E) 3


\(1 + \frac{1}{x} = 2 - \frac{2}{x}\) --> \(\frac{1}{x}+\frac{2}{x}=1\) --> \(\frac{3}{x} = 1\) --> \(x = 3\).

Answer: E.


What did you do at the last step when you had \(\frac{3}{x} = 1\) --> \(x = 3\)?
How did you get rid of the 1 and the fraction?
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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 12 Nov 2013, 06:14
Expert's post
Markster wrote:
Bunuel wrote:
Walkabout wrote:
If 1 + 1/x = 2 - 2/x, then x =

(A) -1
(B) 1/3
(C) 2/3
(D) 2
(E) 3


\(1 + \frac{1}{x} = 2 - \frac{2}{x}\) --> \(\frac{1}{x}+\frac{2}{x}=1\) --> \(\frac{3}{x} = 1\) --> \(x = 3\).

Answer: E.


What did you do at the last step when you had \(\frac{3}{x} = 1\) --> \(x = 3\)?
How did you get rid of the 1 and the fraction?


Multiply both sides by x: \(\frac{3}{x}*x = 1*x\) --> \(3= x\).

Hope it's clear.
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COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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Re: If 1 + 1/x = 2 - 2/x, then x = [#permalink] New post 16 Dec 2014, 07:25
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Re: If 1 + 1/x = 2 - 2/x, then x =   [#permalink] 16 Dec 2014, 07:25
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