數學題 A比C細17歲,B比A細4歲,C比B大二倍,請問他們分別多小歲??
回答 (2)
2007-10-22 3:32 pm
✔ 最佳答案
C - A = 17 -----------------------------------------(1)A - B = 4 ------------------------------------------(2)
C = 2 x B = 2B ----------------------------------(3)
From 2,
A - B = 4
thus, A = 4 + B
From 1,
C - A = 17
2B - 4 - B = 17
B=21
Therefore, A = 4 + 21 = 25
& C = 2 x 21 = 42
A = 25歲
B = 21歲
C = 42歲
2007-10-23 2:20 am
a=25歲
b=21歲
c=42歲
b=21歲
c=42歲
收錄日期: 2021-04-29 20:00:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071022000051KK00476