我又再再一次問解方程啦~今次only one!可唔可以11點前交啊？
1.A bag contauins some 50-cent and $2 coins.The total value of the coins is $102 and there are 96 coins in the bag.Find the number of 50-cent coins in the bag.
最先而答對的那位有禮物！
only one~one only~急急急~only1!
2009-10-20 6:18 am
回答 (2)
2009-10-20 6:22 am
✔ 最佳答案
Let the number of 50-cent coins be x.Then the number of $2 coin is 96 - x
Total value = 0.5x + 2(96 - x) = 102
-1.5x + 192 = 102
1.5x = 90
x = 60
There are 60 50-cent coins
2009-10-21 1:20 am
收錄日期: 2021-04-23 23:20:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091019000051KK01623