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标题: 大家帮忙看看我的解题思路. [打印本页]

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作者: 飞行2010    时间: 2010-3-2 16:43
标题: 大家帮忙看看我的解题思路.
58. A certain store sells chairs individually or in sets of 6.The store charges less for purchasing a set of 6 chairs than for purchasing 6 chairs individually.How much does the store charge for purchasing a set of 6 chairs?

(1)The charge for purchasing a set of 6 chairs is 10 percent less than the charge for purchasing the 6 chairs individually.

(2)The charge for purchasing a set of 6 chairs is $20 more than the charge for purchasing 5 chairs individually.

设一套的是x元，分开的是y元。有两个条件得x=0.9y; x=5y/6+20。两个方程求出来,这样的解法对吗？谢谢。






设一套的是x元，分开的是y元。有两个条件得x=0.9y; x=5y/6+20。两个方程求出来,这样的解法对吗？谢谢。

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作者: 切尔西    时间: 2010-3-3 00:09
错了，既然你设好了未知数，我就借用一下你的
首先根据第一个条件得X=0.9*6Y
第二个条件得X=5Y+20这里不是5Y/6
不过这种题在考试时候是不需要求解的，所以只要自己可以列出思路正确的式子知道可以得到答案就可以了

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作者: 飞行2010    时间: 2010-3-3 09:01
好的,谢谢.

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