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1) 6x - y = 14 (-5)
2) 5x - 3y = 15 (6)
- 30x + 5y = - 70
30x - 18y = 90
--------------------------
0x - 13y = 20
- 13y = 20
y = 20/-13
y = - 20/13
Reemplazo el valor de y en ecuación 1.
6x - y = 14
6x - (- 20/13) = 14
6x + 20/13 = 14
6x = 14 - 20/13
6x = (14 * 13 - 20)/13
6x = (182 - 20)/13
6x = 162/13
x = 162/13/6/1
x = 162/78
x = 27/13
Solución :
x = 27/13
y = - 20/13