3x-2y+z=16 (1)
x+4y+3z=3 (2)
5x+2y-2z=24 (3)
(1)×2+(2)
7x+5z=35 (4)
(1)+(2)
8x-z=40 (5)
(4)+(5)×5
47x=235
所以
x=5
z=8x-40=0
y=(3x+z-16)/2=-1/2