由(1)得
y=2x-6 (3)
(3)代入(2)得
(x+4x-12)(4x-4x+12)=192
12(5x-12)=192
5x-12=16
∴x=28/5
把x=28/5代入(3)得
y=56/5-6=26/5
∴方程组的解是
x=28/5
y=26/5