中一Maths 題！請高人列式！
Sam buys 500 TV games sets at a total cost of $110000. If each game set is sold at a discount of 20%, he will make a profit of 20% .
Find the marked price of each game set . (已知答案 = $330)
中一Maths 題！請高人列式！
2011-12-07 7:12 am
回答 (1)
2011-12-07 7:28 am
✔ 最佳答案
Let Y be the marked price of each game set[Y(100%-20%) - (110000/500)] / (110000/500) = 20%
(0.8Y - 220) = (0.2)(220)
Y = $330
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111206000051KK01027