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回答 (3)
2007-11-24 10:11 pm
a = 80 肯定係錯
a = 20 係全對, 小小心得
a = 20 係全對, 小小心得
2007-11-24 10:06 pm
x(1+40%)(1-a%)=x(1+12%)
1.4-0.014a=1.12
0.014a=0.28
a=20
1.4-0.014a=1.12
0.014a=0.28
a=20
2007-11-24 9:56 pm
a is 80
2007-11-25 15:11:29 補充：
my father is maths teacher!
2007-11-25 15:11:29 補充：
my father is maths teacher!
收錄日期: 2021-04-13 14:33:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071124000051KK01927