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If x + 2y + 1 = y - x, what is the value of x?

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If x + 2y + 1 = y - x, what is the value of x? [#permalink] New post 06 Feb 2012, 07:33
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If x + 2y + 1 = y - x, what is the value of x?

1) y² = 9
2) y = 3
[Reveal] Spoiler: OA

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Re: If x + 2y + 1 = y - x, what is the value of x? [#permalink] New post 06 Feb 2012, 07:37
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Re: If x + 2y + 1 = y - x, what is the value of x? [#permalink] New post 11 Feb 2012, 07:13
fiendex wrote:
If x + 2y + 1 = y - x, what is the value of x?

1) y² = 9
2) y = 3

1) y² = 9 so y = +3 or -3 and both values generate different answer for the value of x, hence insufficient, A and D gone
2) y=3 so this will give us only single value of x, remember solving for the value of x is not required, we know seeing x + 2y + 1 = y - x that if we know y , we will get the value of x... :wink:
IMO B
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Re: If x + 2y + 1 = y - x, what is the value of x? [#permalink] New post 11 Feb 2012, 07:39
B - y could be 3 or -3 in statement 1
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Re: If x + 2y + 1 = y - x, what is the value of x? [#permalink] New post 19 Sep 2013, 09:35
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Re: If x + 2y + 1 = y - x, what is the value of x?   [#permalink] 19 Sep 2013, 09:35
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