4a=7b,2b=5c and a+b+c=126 a=?
回答 (1)
2016-07-13 2:53 pm
4a=7b
b=4a/7
2b=5c
c=2b/5
c=8a/35
a+b+c=126
a+4a/7+8a/35=126
35a+20a+8a=4410
63a=4410
a=70
b=4a/7
2b=5c
c=2b/5
c=8a/35
a+b+c=126
a+4a/7+8a/35=126
35a+20a+8a=4410
63a=4410
a=70
收錄日期: 2021-04-18 15:15:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160713044308AACFdzD