數學 急 方程式
回答 (1)
2012-07-29 6:09 pm
✔ 最佳答案
(5y - 1)/9 - (y - 5)/3 - (7y - 1)/9 = 0(5y - 1) - 3(y - 5) - (7y - 1) = 0
5y - 1 - 3y + 15 - 7y + 1 = 0
-5y + 15 = 0
y = 3
收錄日期: 2021-04-27 17:44:19
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