更新1:
要有算式，謝謝!
3x+2y=Ox-3y=12, 3/2x=y, O=?
回答 (1)
2020-02-13 6:44 pm
3x+2y=12 i
Ox-3y=12 ii
3/2x=y iii
代iii入i
3x+3=12
x=3
代x=3及iii入ii
3O-3(9/2)=12
3O-27/2=12
O=17/2
Ox-3y=12 ii
3/2x=y iii
代iii入i
3x+3=12
x=3
代x=3及iii入ii
3O-3(9/2)=12
3O-27/2=12
O=17/2
收錄日期: 2021-04-18 18:24:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200213074440AAUV7KI