Sistemas Cuadráticos

\[x^2 - 3y = 31 \atop 5x - 4y = 46\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 + 4y = 49 \atop 4x + 4y = 4\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 + 3y = 88 \atop x - 5y = -48\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 + 2y^2 = 48 \atop -x - 3y = 8\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 - y^2 = -16 \atop -2x - y = 1\]
\[x = \mathbf{?}, y = \mathbf{?}\]

\[x^2 - 2y^2 = 8 \atop x - 2y = -8\]
\[x = \mathbf{?}, y = \mathbf{?}\]