Jacky plans to buy a pair of shoes.Two weeks ago,he saved 40% of the selling price of the shoes.Last week,he saved 80% of the rest.This week,the shoes are on sale at a 10% discount,but he still owes $12.Fine the original selling price of the shoes.
thx~
[math]一條數
2008-01-14 1:19 am
回答 (1)
2008-01-14 1:39 am
✔ 最佳答案
設鞋為Ｘ，X-40%X-(1-40%)X*80%-10%x=12
X-0.4X-0.48X-0.1X=12
0.02X=12
X=600
收錄日期: 2021-04-23 22:28:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080113000051KK02847