數學問題急急急?求大大幫忙!!?
回答 (1)
2020-12-19 3:47 pm
✔ 最佳答案
(2x+y):(3x+2y)=3:5<==> 5(2x+y) = 3(3x+2y)
<==> x = y
代入 5x-y = 8 得
x = y = 2
∴ (x-1) : (y+1) = 1 : 3
收錄日期: 2021-05-04 02:33:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20201219073907AA7miri