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Metodo de eliminacion.
y + x = 5 (1)
y - x = - 6 (2) Sumas (1) y (2)
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2y = - 1
y = - 1/2 Reemplazas este valor en (1)
y + x = 5
- 1/2 + x = 5
x = 5 + 1/2
x = 10/2 + 1/2
x = (10 + 1)/2
x = 11/2
Solucion.
(11/2 , - 1/2)