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Metodo de sustitución.
3x + 2y = 3 (1)
- 2x + y = - 5 (2)
De (2) depejo x
- 2x + y = - 5
y = 2x - 5 (3) Sustituyo este valor en (1)
3x + 2y = 3
3x + 2(2x - 5) = 3
3x + 4x - 10 = 3
7x = 10 + 3
7x = 13
x = 13/7 Reemplazas este valor en (3)
y = 2x - 5
y = 2(13/7) - 5
y = 26/7 - 5
y = 26/7 - 35/7
y = (26 - 35)/7
y = -9/7
Solución.
(13/7 , - 9/7)