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求一道数学题的答案（附过程）急急急！！！！！！

2024-12-04 05:27:18

推荐回答（5个）

回答1：

设：梨运进X千克，那么苹果的质量为1.5X千克，香蕉的质量为2/3X千克。
因为一共运进390千克
所以
X+1.5X+2/3X=390
19/6X=390
X=2340/19
1.5X=3510/19
2/3X=1560/19
答：运进梨2340/19千克
运进苹果3510/19千克
运进香蕉1560/19千克。

回答2：

首先，假设梨的质量是X

那么：1.5X是苹果的质量 2X/3是香蕉的质量

1.5X+2X/3+X=390
27X/6=390
X=260/3
所以，苹果有130kg,香蕉有520/9kg,梨有260/3kg.

回答3：

设：苹果，香蕉，梨各运进x，y，z千克
则：x+y+z=390，x=1.5z，y=2/3*z
得出：x=3510/19≈185，y=4680/57≈82，z=2340/19≈123

回答4：

解：设运进梨x千克，则苹果为1.5x，香蕉为2/3x
x＋1.5x＋2/3x＝390
得x＝123.15789

回答5：

设梨有X千克,有
1.5X+2/3X+X=390
X=6*390/19

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