og 11 第200题。帮忙解答一下吧。

xiaoyuexiao

A store currently charges the same price for each towel that it sells.If the current price of each towel wereto be increased by 1dollar, 10 fewer of the towels could be bought for 120 dollars,excluding sales tax.What is the current price of each towel?

A.1 刀

B.2刀

C.3刀

D.4刀

E.12刀

我不明白为什么选C。而且"10 fewer of the ..."这句话怎么理解呢？

非常感谢！

luckycat

 "10 fewer of the ..."这句话怎么理解呢？

－－意思是说按每条towel涨1刀来算，120刀能买的毛巾比不涨价前要少10条。

设现在价格是X刀， 120/(x+1)=120/x +10   得出x＝3 or x＝－4 （－4当然不可能了）

xiaoyuexiao

谢谢！原来如此！

我理解成小于10了。。。