Resumen
Ejercicio 1
\[-x - 4y = 11x \atop 2x - 3y = 22x\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
Ejercicio 2
\[-3x - 4y = 9x \atop 2x - 3y = 28x\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
Ejercicio 3
\[x^2 - y = 41 \atop -2x + 3y = -3\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
Ejercicio 4
\[x^2 - y^2 = 21 \atop -x - 3y = 1\]
\[x = \mathbf{?}, y = \mathbf{?}\]
\[x = \mathbf{?}, y = \mathbf{?}\]
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