Form Three Maths
2007-10-05 2:13 am
5. The present weight of Cathy increases by 12% in comparison with that of half year before . If her present weight is 50.4 kg, what was Cathy's weight half year before??
回答 (2)
2007-10-05 2:17 am
✔ 最佳答案
LET X be the Cathy's weight half year before1.12X=50.4
X=45
參考: ME
2007-10-05 2:17 am
Let Y be Cathy's weight half year before
Y x (1+12%) = 50.4
Y x 120% = 50.4
Y = 42
therefore, Cathy's weight half year before is 42 kg
希望幫到你la~~
Y x (1+12%) = 50.4
Y x 120% = 50.4
Y = 42
therefore, Cathy's weight half year before is 42 kg
希望幫到你la~~
參考: me
收錄日期: 2021-04-13 13:45:05
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071004000051KK02523