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14 Aug 2016, 07:16
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
72% (01:04) correct
28%
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wrong
based on 115
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If 3y = 2x + 6, what is the value of x?
(1) 6y = 4x + 12
(2) 2y = 3x − 3
(1) 6y = 4x + 12
(2) 2y = 3x − 3
14 Aug 2016, 08:18
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Bunuel
B is the correct answer
(1) 6y = 4x + 12
This equation cannot be used to solve for variable x or y as it will give us infinite many solutions when used in conjunction with the equation given in the stimulus.
\(\frac{a1}{a1}=\frac{b1}{b2}=\frac{c1}{c2}\)
\(\frac{3}{6}=\frac{2}{4}=\frac{6}{12}\)
\(\frac{1}{2}=\frac{1}{2}=\frac{1}{2}\)===>Infinite many solution
(2) 2y = 3x − 3
Gives us unique solution
Sufficient
ANSWER IS B
12 Dec 2017, 20:26
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If you multiply the eqn in the qn by 2 you get the same eqn as statement 1.
2 * (3y = 2x + 6) = 6y = 4x + 12
So statement 1 is not sufficient.
If you solve statement 2 , you can get the values of x and y by simultaneous method.
2 * (3y = 2x + 6) = 6y = 4x + 12
So statement 1 is not sufficient.
If you solve statement 2 , you can get the values of x and y by simultaneous method.
