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In the system of equations above, what is the value of x?

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Manager
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In the system of equations above, what is the value of x?  [#permalink]

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New post 13 May 2012, 13:04
1
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

85% (00:45) correct 15% (00:51) wrong based on 169 sessions

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2x + 2y = -4
4x + y = 1

In the system of equations above, what is the value of x?

A. -3
B. -1
C. 2/5
D. 1
E. 1 3/4

OA is D

Here is how I solved it, but didn't arrive at any of the above answer choice:

2x + 2y = -4 => x + y = -2
4x + y = 1

Subtract one equation from the other, get x = 1/3


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Concentration: Finance, Technology
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Re: In the system of equations above, what is the value of x?  [#permalink]

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New post 13 May 2012, 13:18
answer is D

so u have
x + y = -2 and
4x + y= 1

Subtract the second from the first

(x-4x) + (y-y) = (-2-1)
-3x = -3
x = 1
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Re: In the system of equations above, what is the value of x?  [#permalink]

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New post 31 Mar 2017, 01:08
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Re: In the system of equations above, what is the value of x? &nbs [#permalink] 31 Mar 2017, 01:08
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