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1) 3x - 4y = - 26 (3)
2) 2x - 3y = - 19 (-4)
9x - 12y = - 78
- 8x + 12y = 76
--------------------
x + 0y = - 2
x = - 2
Reemplazo x = - 2 en ecuación 2.
2x - 3y = - 19
2 (-2) - 3y = - 19
- 4 - 3y = - 19
- 3y = - 19 + 4
- 3y = - 15
y = -15/-3
y = 5
Solución :
x = - 2
y = 5