OG 11th 第200题

stupybighead · 发表于 2006-9-20 14:31:00

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?

Answer: $3

10 fewer of the towels could be bought for $120,啥意思啊？大虾赐教

arizonahk · 发表于 2006-9-20 15:08:00

就是说,比如原来40条TOWEL卖120,现在30条TOWEL 就卖120了.价格涨了.

列式子为:120/x-120/x+1=10

x=3

stupybighead · 发表于 2006-9-21 09:05:00

got u!

so thanks

坚定之路 · 发表于 2007-12-6 22:40:00

"10 fewer of the towels could be bought for $120"好像没有暗示说按原价格卖，收入也是120元；这个重要的条件是怎么看出来的？

OG 11th 第200题

OG 11th 第200题

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