May has 10 coins .
Some of them are $5 coins and the other are $10 coins.
If the number of $10 coins is less than 3 times the number of
$5 coins by 2, find the number of $5 coins?
S1 Meths question
2009-02-17 3:39 am
回答 (1)
2009-02-17 3:43 am
✔ 最佳答案
Let the number of $5 coins be x, thus there are (10-x) $10 coins.Thus, 10-x=3x-2
10=4x-2
12=4x
x=12/4
x=3
收錄日期: 2021-04-15 17:17:58
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