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If 2/(1+2/y)=1, then y =

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If 2/(1+2/y)=1, then y = [#permalink] New post 29 Dec 2012, 06:27
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If \frac{2}{1+\frac{2}{y}}=1, then y =

(A) -2
(B) -1/2
(C) 1/2
(D) 2
(E) 3
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Re: If 2/(1+2/y)=1, then y = [#permalink] New post 29 Dec 2012, 06:30
Walkabout wrote:
If \frac{2}{1+\frac{2}{y}}=1, then y =

(A) -2
(B) -1/2
(C) 1/2
(D) 2
(E) 3


\frac{2}{1+\frac{2}{y}}=1 --> \frac{2}{\frac{y+2}{y}}=1 --> \frac{2y}{y+2}=1 --> 2y=y+2 --> y=2.

Answer: D.
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Re: If 2/(1+2/y)=1, then y =   [#permalink] 29 Dec 2012, 06:30
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