Solución 1
\[x^2 + 5y = -31 \atop -3x + 3y = -27\]
\[x = \boxed{2}, y = \boxed{-7}\]
Solución 2
\[x^2 + 2y = 48 \atop 4x + 3y = 8\]
\[x = \boxed{8}, y = \boxed{-8}\]
Solución 3
\[x^2 + 3y = 13 \atop 5x + 2y = -22\]
\[x = \boxed{-4}, y = \boxed{-1}\]
Solución 4
\[x^2 - 2y^2 = -16 \atop -x - 3y = 8\]
\[x = \boxed{4}, y = \boxed{-4}\]
Solución 5
\[x^2 + 2y^2 = 57 \atop 3x - y = -19\]
\[x = \boxed{-5}, y = \boxed{4}\]
Solución 6
\[x^2 - y^2 = 0 \atop 3x + 2y = -25\]
\[x = \boxed{-5}, y = \boxed{-5}\]
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