$\left\{\begin{matrix} \frac{1}{3x}+\frac{2x}{3y} = (x+\sqrt{y})/(2x^2+y) & \\ 2x(1+y)=(2+\sqrt{y})(\sqrt{2x+1}) & \end{matrix}\right.$
12-12-2014 - 22:07
$\left\{\begin{matrix} \frac{1}{3x}+\frac{2x}{3y} = (x+\sqrt{y})/(2x^2+y) & \\ 2x(1+y)=(2+\sqrt{y})(\sqrt{2x+1}) & \end{matrix}\right.$
17-02-2013 - 19:32
31-10-2012 - 21:26
29-10-2012 - 16:24
12-10-2012 - 20:51
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