设桃树有x,梨树有3x
x+3x=320
4x=320
x=80
80乘3=240棵
答：梨树有240棵,桃树有80棵
果园里有梨树和桃共320棵,梨树是桃树的3倍.梨树和桃树各有多少棵 急,今天之内啊
果园里有梨树和桃共320棵,梨树是桃树的3倍.梨树和桃树各有多少棵 急,今天之内啊
其他人气：889 ℃时间：2019-10-17 08:15:29
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