Question 42
If $x$ and $y$ are positive real numbers such that
$$
\sqrt{2x} + \sqrt{y} = 13 \text{ and } \sqrt{8x} + \sqrt{9y} = 35,
$$
calculate $20x + 23y$.
$$
\sqrt{2x} + \sqrt{y} = 13 \text{ and } \sqrt{8x} + \sqrt{9y} = 35,
$$
calculate $20x + 23y$.