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07 Oct 2017, 08:50
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A
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:
56% (01:12) correct
44%
(01:34)
wrong
based on 267
sessions
History
Date
Time
Result
Not Attempted Yet
What is the value of y ?
1) \(\frac{4xy+2y}{6x+3} = y-3\)
2) \(x=2\)
1) \(\frac{4xy+2y}{6x+3} = y-3\)
2) \(x=2\)
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
07 Oct 2017, 09:50
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What is the value of y ?
(1) \(\frac{4xy+2y}{6x+3} = y-3\);
Factor our 2y from the numerator and 3 from the denominator: \(\frac{2y(2x+1)}{3(2x+1)} = y-3\);
Reduce by 2x+1: \(\frac{2y}{3} = y-3\);
Cross-multiply: \(2y = 3y - 9\);
Solve to get y =9.
Sufficient.
(2) \(x=2\). Nothing about y. Not sufficient.
Answer: A.
(1) \(\frac{4xy+2y}{6x+3} = y-3\);
Factor our 2y from the numerator and 3 from the denominator: \(\frac{2y(2x+1)}{3(2x+1)} = y-3\);
Reduce by 2x+1: \(\frac{2y}{3} = y-3\);
Cross-multiply: \(2y = 3y - 9\);
Solve to get y =9.
Sufficient.
(2) \(x=2\). Nothing about y. Not sufficient.
Answer: A.
07 Oct 2017, 10:00
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@bunuel,
For reducing by 2x+1, shouldnt we be sure that x is not equal to -1/2.
Sent from my iPhone using GMAT Club Forum
For reducing by 2x+1, shouldnt we be sure that x is not equal to -1/2.
Sent from my iPhone using GMAT Club Forum
