請問這題聯立方程式怎麼解?
回答 (5)
2019-12-10 3:50 pm
✔ 最佳答案
(1) 9x - 3y = 10(2) -3x + 9y = 20
(1) + (2)×3: 24y = 70
(1)×3 + (2) 24x = 50
∴ x = 50/24 = 25/12,
y = 70/24 = 35/12
收錄日期: 2021-05-04 01:07:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20191209102759AASwxTQ