x+2y-4z=0 3x+y-z=0,则x:y:z=

x+2y-4z=0 3x+y-z=0,则x:y:z=
x+2y-4z=0 3x+y-z=0,则x:y:z=

x+2y-4z=0 3x+y-z=0,则x:y:z=
x+2y-4z=0 .[1]
3x+y-z=0.[2]
[1]*3:3x+6y=12z.[3]
[3]-[2]:5y=11z
y=11/5z
x=4z-2*11/5z=-2/5z
x:y:z=(-2/5z):(11/5z):z=(-2):11:5

－2：11：5