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1) - 2x + y = 3 (3)
2) 3x + y = 2 (2)
- 6x + 3y = 9
6x + 2y = 4
-------------------
0x + 5y = 13
5y = 13
y = 13/5
El valor de y lo reemplazo en ecuación 2
3x + y = 2
3x + 13/5 = 2
3x = 2 - 13/5
3x = (2 * 5 - 13)/5
3x = (10 - 13)/5
3x = - 3/5
x = - 3/5/3/1
x = - 3/15
x = - 1/5
Solución :
x = - 1/5
y = 13/5