英數列式 急急急

2010-03-03 5:54 am
1) When Mr. lee left Company A to work in Company B, his salary increased by 20%. However, he later moved from Company B to Company C, and his salary decreased by 20%. Mr. Lee's monthly salary at Company C was $6240 how much did he earn at Company A per month?
2) Mr. Wong had a total of $70 .The younger brother had $2 more than 1/3 of the elder brother's money. How much did the younger brother have?

回答 (1)

2010-03-03 6:51 am
✔ 最佳答案
1) Let h be Company A per month:

[h x (1+20%)] x (1-20%) = $6240
參考: me


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