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中一Maths 題!請高人列式!

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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)

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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

其他解答:6FE1C172E25AFD66
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