1 4t-6=4-t
2 90%y-16=85%y
方程(中一)暑期加油打氣坊
2012-08-12 12:56 am
回答 (2)
2012-08-12 1:26 am
✔ 最佳答案
1.4t-6 = 4-t
4t-6+6 = 4-t+6
4t = 10-t
4t+t = 10-t+t
5t =10
5t/5 = 10/5
t=2
2.
90%y -16 = 85%y
0.9y -16 = 0.85y
0.9y -16 -0.85y = 0.85y -0.85y
0.05y -16 = 0
0.05y -16 +16 = 0+16
0.05y = 16
0.05y /0.05 = 16 /0.05
y=400
2012-08-11 17:27:44 補充：
Sorry!
16 /0.05 = 320
y=320
參考: me, me
2012-08-12 1:08 am
1.t=0.4
2y=320
2012-08-11 17:09:08 補充：
sorry
t=0.4
2.y=320
2y=320
2012-08-11 17:09:08 補充：
sorry
t=0.4
2.y=320
收錄日期: 2021-04-13 18:54:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120811000051KK00437