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1) 3x - 4y = 6 (-2)
2) 2x - 4y = 16 (3)
- 6x + 8y = - 12
6x - 12y = 48
---------------------
0x - 4y = 36
- 4y = 36
y = 36/-4
y = - 9
Reemplazo y en 1.
3x - 4y = 6
3x - 4 (-9) = 6
3x + 36 = 6
3x = 6 - 36
3x = - 30
x = -30/3
x = - 10
Solución :
x = - 10
y = - 9