maths----高手入黎
回答 (2)
2007-08-13 12:35 am
✔ 最佳答案
2x--- + 7 = 3
9
x = -18 ( 負十八 )
2007-08-13 12:58 am
2x
--- + 7 = 3
9
2x
--- = 3 - 7
9
2x
--- = -4
9
2x = - (4*9)
2x = -36
x = -18
--- + 7 = 3
9
2x
--- = 3 - 7
9
2x
--- = -4
9
2x = - (4*9)
2x = -36
x = -18
收錄日期: 2021-04-13 18:09:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070812000051KK02997