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x + 4y = 6

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x + 4y = 6 [#permalink] New post 20 Sep 2017, 10:47
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Question Stats:

87% (00:17) correct 12% (00:17) wrong based on 8 sessions


x + 4y = 6 and x=2y

Quantity A
Quantity B
x
y


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: x + 4y = 6 [#permalink] New post 22 Sep 2017, 22:12
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Carcass wrote:
x + 4y = 6 and x=2y

Quantity A
Quantity B
x
y


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.



Given

x + 4y = 6

and x=2y now substituting the value of x in first equation we get -

2y + 4y = 6

or 6y = 6

or y =1

Therefore x =2 (from equation 2)

So A>B
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Re: x + 4y = 6 [#permalink] New post 24 Sep 2017, 14:27
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x + 4y = 6----1)
& x - 2y = 0----2)
---------------------
Adding equation 1) and 2)

we get, 6y = 6 which implies y = 1

substituting value of y in equation 2) , we get x = 2

hence x > y

So option A
Re: x + 4y = 6   [#permalink] 24 Sep 2017, 14:27
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x + 4y = 6

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