方程组2x-y+z=0,3x+2y-3z=0 求x :y : z

2025-05-21 06:38:38
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回答(1):

2x-y+z=0------(1)
3x+2y-3z=0 ---(2)
(1)式*2+(2)式得
7x-z=0
7x=z
(1)式*3+(2)式得
9x-y=0
9x=y
x:y:z=1:9:7