回答以下問題，加上清楚的列式!!!
1. A sum of money is to be evenly shared among 10 persons. However, two
of them are absent, so each of the 8 attendees gets $30 more. Find the total
amount of money.
2. In a supermarket, the price of an apple is $2.5, and orange is $3. Alan got
$2 left after buying some apples. However, he would need $2 more if he
wanted to buy the same number of oranges. Find the number of apples he
bought.
Maths!!!
2008-06-15 7:54 pm
回答 (2)
2008-06-15 9:51 pm
✔ 最佳答案
1.
Let $y be the amount of money.
Each of the 10 persons can get $(y/10).
Each of the 8 attendees can get $(y/8).
(y/8) - (y/10) = 30
10y - 8y = 2400
y = 1200
Ans: The amount of money is $1200.
=====
2.
Let w be the number of apple he bought.
Cost of w apples = $2.5w
Cost of w oranges = $3w
Difference in cost = (+$2) - (-$2) = $4
3w - 2.5w = 4
0.5w = 4
w = 8
Ans: He bought 8 apples.
=
2008-06-15 8:46 pm
(1)The total amount of money is $1200.
(2)1 apple.
(2)1 apple.
收錄日期: 2021-04-23 23:07:14
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080615000051KK00798