B的年紀係A的一半，亦是C的三份二。他們三人的年齡總和是63，求他們的年齡。
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1條中一的數學題 (請幫幫忙...急要) 幫得幾多得幾多...拜託~
2008-08-30 5:34 am
回答 (2)
2008-08-30 5:51 am
✔ 最佳答案
B= A/2 = (2C)/3A/2 = (2C)/3
4C = 3A
A = (4C)/3
A+B+C = 63
(4C)/3 + (2C)/3 + C = 63
(4C^2+2C^2+3C^2) / 3C = 63
9C^2 / 3C = 63
3C = 63
C = 21
A = (4C) / 3 = 4*21/3 = 28
B = (2C) / 3 = 2/3*21 = 14
參考: ME
2008-08-30 7:33 am
收錄日期: 2021-04-13 16:01:35
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080829000051KK02928