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今天开始看的OG 做test的时候第一题就卡住了啊。。。求各位大神帮忙啊。。。 Last month a certain music club offered a discount to preferred customers. After the first compact disc purchased, preferred customers paid $3.99 for each additional compact disc purchased. If a preferred customer purchased a total of 6 compact discs and paid $15.95 for the first compact disc, then the dollar amount that the customer paid for the 6 compact discs is equivalent to which of the following? 这个是什么意思啊?没明白怎么回事 答案也没看明白。。。 |
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