$$\frac { 1 } { 3 } ( x - \frac { y ^ { 2 } } { 4 } ) ( 2 x - \frac { 1 } { 4 } ) x = 2 y = 5$$
$x = \frac{9 ^ {\frac{2}{3}} {(\sqrt[3]{\sqrt{20363419005} + 142776} + \sqrt[3]{142776 - \sqrt{20363419005}} + 9 \sqrt[3]{9})}}{144} = 2.6679591572141543$
$y = \frac{5}{2} = 2\frac{1}{2} = 2.5$
