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1) 6x - 5y = 15 (8)
2) 6x - 8y = 6 (-5)
Multiplicas las ecuaciones por los números indicados.
48x - 40y = 120
- 30x + 40y = - 30
------------------------
18x + 0y = 90
18x = 90
x = 90/18
x = 5
El valor de x lo reemplazo en ecuación 2
6x - 8y = 6
6 (5) - 8y = 6
30 - 8y = 6
- 8y = 6 - 30
- 8y = - 24
y = - 24/-8
y = 3
Respuesta.
x = 5
y = 3