A+B = 6, 2C=3A, 1B+1C=7
問題 : B = ??
小學數學題
2010-05-30 11:05 am
回答 (2)
2010-05-30 11:28 am
✔ 最佳答案
A+B = 6A = 6-B
2C = 3A
3A = 2C
A = 2C/3
所以,
6-B = 2C/3
1B+1C = 7
C = 7 - B
6-B = 2(7-B)/3
3/2 * (6-B) = 7-B
9 - 3/2B = 7-B
1/2B = 2
B = 4
2010-05-30 6:41 pm
哇!很難!我的學校沒有teach me!
收錄日期: 2021-04-13 17:16:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100530000051KK00181