Gwd6-9: For a certain play performance, adults’ tickets were sold for $12 each and children’s tickets were sold for $8 each. How many children’s tickets were sold for the performance? (1) The total revenue from the sale of adults’ and children’s tickets for the performance was $5,040. (2) The number of adults’ tickets sold for the performance was 1/3 the total number of adults’ and children’s tickets sold for the performance. The Key is C. Gwd6-30 Joanna bought only $0.15 stamps and $0.29 stamps. How many $0.15 stamps did she buy?
(1) She bought $4.40 worth of stamps.
(2) She bought an equal number of $0.15 stamps and $0.29 stamps.
The Key is A. 我觉得这两个题目挺像的，12题也可以通过第一个条件推出结论阿，难道还有别的解么？麻烦大家举一下例子哦。谢谢。 | 
