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27 Nov 2018, 13:45
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
63% (01:12) correct
37%
(01:24)
wrong
based on 27
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of x?
(1) |2x + 3| = 4
(2) |4x – 4| = 2
(1) |2x + 3| = 4
(2) |4x – 4| = 2
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
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27 Nov 2018, 22:09
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rencsee
(1) |2x + 3| = 4 means that 2x+3 is either equal to 4 or -4.
2x+3 = 4, gives x = 1/2; while 2x+3 = -4, gives x = -7/2.
Since these are 2 distinct values, the statement is Not Sufficient to answer the question.
(2) |4x – 4| = 2 means that 4x-4 is either equal to 2 or -2.
4x-4 = 2, gives x = 3/2, while 4x-4 = -2, gives x = 1/2.
Since these are 2 distinct values, the statement is Not Sufficient to answer the question.
Combining the two statements, the only common value of x is 1/2, which is unique. So Sufficient to answer the question.
Hence C answer.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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