Resumen
Ejercicio 1
\[-5x + 5y = -55x \atop -4x + 2y = -42x\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
Ejercicio 2
\[x^2 + 5y = -31 \atop -3x + 3y = -27\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
Ejercicio 3
\[x^2 + 3y = 13 \atop 5x + 2y = -22\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
Ejercicio 4
\[x^2 + 2y^2 = 57 \atop 3x - y = -19\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
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