从方程组4x-3y-3z=0,x-3y+z=0(xyz≠0),则x:z=__,y:z+___
2个回答
4x-3y-3z=0,========>4x-3y=3z (1)
x-3y+z=0(xyz≠0),==>x-3y=-z (2)
(1)-(2)得
3x=4z,9y=7z
x:z=4:3
y:z=7:9
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