CPM Homework Help : PC3 Problem 7-64

Solve the system of equations at right.

$\left. \begin{array} { l } { \sqrt { 2 x } - \sqrt { 5 y } = 12 } \\ { 3 \sqrt { 2 x } + 6 \sqrt { 5 y } = 45 } \end{array} \right.$

Hint:

Let $u=\sqrt{2x}$ and $w=\sqrt{5y}$ .

Step:

Solve the system:
$u-w=12$
$3u+6w=45$