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Data Sufficiency (DS) | Re: x is how many times y if y ≠ 0? (1) x/y + y/x - 2y = 0 (2) x = 2y/x

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SajjadAhmad wrote:

\(x\) is how many times of\(y\) if\( y ≠0\) ?

(1)\(\frac{x}{y} +\frac{ y}{x -2y} =0\)

(2)\( x =\frac{ 2y}{x +y}\)

Source: NovaGMAT



Asked:\(x\) is how many times of\(y\) if\( y ≠0\) ?

(1)\(\frac{x}{y} +\frac{ y}{x -2y} =0\)
\(\frac{x}{y} +\frac{ y}{x -2y} =0\)
\(\frac{ x(x-2y) +y^2}{y(x-2y)} =0\)
\(\frac{ (x^2 - 2xy +y^2)}{y(x-2y)} =0\)
\(\frac{(x-y)^2}{y(x-2y)} =0\)
x = y
SUFFICIENT

(2)\( x =\frac{ 2y}{x +y}\)
x(x+y) = 2y
x^2 + xy - 2y = 0
y = x^2/(2-x)
NOT SUFFICIENT

IMO A
...

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