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, 10 fewer of the towels
could be bought for $120, excluding sales tax. What is
the current price of each towel?
我不知是不是没有读懂题目,看了答案知道,涨价前的价格×涨价钱的数量也等于$120,你们能看出这个意思吗?如果看不出来,根本没有办法解这个题目。
谢谢!!
-- by 会员 will980980 (2010/3/6 5:03:26)