果园有果树140,其中苹果树与桃树的比是2：3,桃树与梨树比是4：5,这3种树各有多少棵?
这没学，请说说XX
人气：118 ℃ 时间：2019-11-23 03:33:33
解答
桃树：x；苹果树：（2/3）x；梨树：（5/4）x
x+（2/3）x+（5/4）x=140 x=48
桃树：48
苹果树：32
梨树：60
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