\[\begin{cases} \frac{1}{3x-9y} + x = 3 \\ \frac{x}{3x-9y} = -40 \end{cases}\]

\[\begin{cases} x_1 = -\square \\ y_1 = -\square \frac{\square}{\square} \end{cases}\]

\[\begin{cases} x_2 = \square \\ y_2 = \square \frac{\square}{\square} \end{cases}\]