标题: 求助OG195 [打印本页] 作者: liikkk 时间: 2011-8-3 17:14 标题: 求助OG195 195。A store currently charges the same price for each towel that it sells.If the current price of each towel were to be increased by $1, 10fewer of the towels could be bought for $120, excluding sales tax. What is the current price of each towel? A. $ 1 B. $ 2 C. $3 D. $ 4 E. $ 12 求解答，我想来想去还没弄懂这题目的意思，正确答案是 C。。作者: Tobelogical 时间: 2011-8-3 17:32
设价格x，则碗的数量为120/x, 得 (x+1)*(120/x - 10)=120 计算得， x=3或x=-4作者: liikkk 时间: 2011-8-3 17:43
If the current price of each towel were to be increased by $1, 10fewer of the towels could be bought for $120 请问这句话应该怎么理解？ 少了10个毛巾还是一样的总价？作者: Tobelogical 时间: 2011-8-3 17:46
呃，不是碗啊，8好意思看错了。 意思是说，如果现在的价格增加1块钱，那么以前120元卖出去的碗数就会少10个 比方说，以前120块卖40个碗，涨价只要卖30个就120了。作者: Tobelogical 时间: 2011-8-3 17:47
这个GMAC太挫了，语法提倡主动优先，数学搞这么多被动。 真是wordy and awkward!!作者: liikkk 时间: 2011-8-3 18:02
哈哈。 确实很WORDY。 弄懂了，谢谢~~~
