已知x/3=y/4=z/7,求:(1)x:y;(2)x:y:z
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已知x/3=y/4=z/7,求:(1)x:y;(2)x:y:z
已知x/3=y/4=z/7,求:(1)x:y;(2)x:y:z
已知x/3=y/4=z/7,求:(1)x:y;(2)x:y:z
x/3=y/4
x:y=3:4
x:y=3:4=9:12
y/4=z/7
y:z=4:7=12:21
x:y:z=9:12:21
3:4 3:4:7
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