At a fruit stand yesterday, the price of each apple was $0.10 more than the price of each orange. What was the total revenue from the sale of oranges at the fruit stand yesterday? (1) The number of oranges sold at the fruit stand yesterday was 5 more than the number of apples. (2) The total revenue from the sale of apples at the fruit stand yesterday was $15.00 这道题答案给的是C, 可我怎么算也是两个未知数啊,急求各位牛牛了 | 
