Alice had some $10 banknotes,$20 banknotes and $100 banknotes.The number of $10 banknotes is 3 times that of $20 banknotes.The number of $20 banknotes is 8 times that of $100 banknotes.If Alice had $1500,find the number of $100 banknotes she had.
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數學方程一問
2006-11-19 3:41 am
回答 (1)
2006-11-19 3:59 am
✔ 最佳答案
Let a be the number of $100 banknotes Alice had.100a+8a(20)+8(3)a(10)=1500
100a+160a+240a=1500
500a=1500
a=3
So Alice has 3 numbers of $100 banknotes.
收錄日期: 2021-04-12 22:13:50
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