x-(x乘40precentage)-(x乘(1-40prcentage)乘30precentage)-6000=4500
x是未知數
F.1 maths 1 條
2007-02-09 12:22 am
回答 (4)
2007-02-11 2:05 am
25000
2007-02-09 12:32 am
yes~the same
2007-02-09 12:28 am
x-x(40%)-x(1-40%)(30%)-6000=4500
x-0.4x-x(60%)(30%)=10500
0.6x-0.18x=10500
0.42x=10500
x=10500/0.42
x=25000
x-0.4x-x(60%)(30%)=10500
0.6x-0.18x=10500
0.42x=10500
x=10500/0.42
x=25000
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070208000051KK01737