若5:X:6/5=3:1/2:Y 求X Y之值
設4:5:7=6:X:Y 求X= Y=
已之2X:3Y:4Z=1:2:3 且1/X:1/Y:1/Z=6:A:B 求A= 求B=
收錄日期: 2021-04-26 17:58:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080428000016KK06176