九分之一比三分之二等于十二分之七比X 九分之一比三分之二等于一十二分之七比x
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9\u5206\u4e4b1:3\u5206\u4e4b2=12\u5206\u4e4b7\uff1aX
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9\u5206\u4e4b1X=18\u5206\u4e4b7
X=18\u5206\u4e4b7\u00f79\u5206\u4e4b1
X=2\u5206\u4e4b7
red
九分之一比三分之二等于十二分之七比X
1/9 : 2/3 = 7/12 : x
(1/9)/(2/3) = (7/12)/x
1/6 = 7/(12x)
12x =42
x=7/2
图
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