更新1:
sor 係 2(8n-10)=9n+8
easy maths
回答 (2)
2010-10-31 7:51 pm
✔ 最佳答案
2(8n-10)=9n-816n-20=9n-8
7n=12
n=7/12
2(8n-10)=9n+8
16n-20=9n+8
7n=28
n=4
收錄日期: 2021-04-19 23:31:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101031000051KK00330