A cook went to a market to buy some eggs and paid $12. But since the eggs were quite small, he talked the seller into adding two more eggs, free of charge. As the two eggs were added, the price per dozen went down by a dollar. How many eggs did the cook bring home from the market 8 12 15 16 18 The price of eggs was $12. Let E denote the number of eggs and P denote the price. [attachimg=152,27]75950[/attachimg] 请教怎么求出E的值啊？ 多谢！作者: jessicaddq 时间: 2010-3-5 00:50
E*P=12作者: anniebag 时间: 2010-3-5 00:52 标题: 那E呢 EP=12的话，怎么求出E呢？作者: garychen2009 时间: 2010-3-5 11:32
把上面2个方程连起来。我算出来 E=16,P=3/4.作者: 鸡同鸭讲 时间: 2010-3-5 17:38
同意3楼．Ｅ＝16