已知{2x-y-z=0,3x-9y+z=0求1,x:y:z
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已知{2x-y-z=0,3x-9y+z=0求1,x:y:z
![已知{2x-y-z=0,3x-9y+z=0求1,x:y:z](/uploads/image/z/19385286-6-6.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BD%9B2x-y-z%3D0%2C3x-9y%2Bz%3D0%E6%B1%821%2Cx%3Ay%3Az)
2x-y=z
3x-9y=-z
18x-9y=9z
3x-9y=-z
15x=10z x=2z/3
2x-z=4z/3-z=z/3=y
x:y:z=2z/3:z/3:z=2:1:3
3x-9y=-z
18x-9y=9z
3x-9y=-z
15x=10z x=2z/3
2x-z=4z/3-z=z/3=y
x:y:z=2z/3:z/3:z=2:1:3
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