如果2x-3y=z x+3y-14z=0 求x:y:z 快,
1个回答
2x-3y=z a
x+3y-14z=0 b
a+b 得
3x=15z
x=5z c
c代入a 得
10z-3y=z
y=3z
x:y:z=5z:3z:z=5:3:1
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