a) { y = x+ 4
{ x+ y = 6
b) { x + y = 10
{ x - y = 4
化簡
3a-3 5b + 5
____ 乘 ______
5 a-1
收錄日期: 2021-04-13 15:25:29
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070103000051KK02384