若 a , b , c為三個相異質數,且66 - a = 33 + b = c - 25
a + b + c=?
收錄日期: 2021-04-21 22:15:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100805000051KK00918