看似簡單,其實內有玄機的數學題,

2010-04-17 12:31 am
甲有80元,比乙少1/5,乙有? (這條要方程)
(請解釋每個數點來的)
更新1:

你寫左乙 has $ 400....

回答 (1)

2010-04-17 12:45 am
✔ 最佳答案
甲有80元,比乙少1/5,乙有? (這條要方程)
Let 乙 has $x,
(x - 80)/x = 1/5
5x - 400 = x
4x = 400
x = 100
乙 has $ 400.


2010-04-16 17:24:07 補充:
乙有100元
參考: Hope can help you^^”


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