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标题: 请教费费逻辑与数学(绿皮)304 [打印本页]

作者: chenjinchent 时间: 2006-6-19 13:26 标题: 请教费费逻辑与数学(绿皮)304

304. A certain theater has 100 balcony seats .For every 2 dollar increase in the price of a balcony seat above 10 dollars,5 fewer seats will be sold.if all the balcony seat are sold when the price of each seat is ten dollar,which of the the following could be the price of a balcony seat if the revenue from the sale of balcony seats is 1360 dollar?

看不明白题目意思

作者: daoying 时间: 2006-6-20 20:02

我给你列个式子看你这样能理解吧

(10+2X)(100-5X)=1360

解出X=12或X=3

求每个座位的价格可能是什么,其实就是求10+2X,代入就行,16是其中一个答案

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