Question

英语版数学题，急急急！

Fiona has some money. If she buys 15kg of sugar,she would be short of $12. If she buys 8 kg of sugar,she would have $9 left. How much does 1 kg of sugar cost?

Answer 1

翻译：菲奥拉买糖，买15KG缺12元，8KG多9元，问1KG多少钱
我们知道从8KG-15KG多了7KG
而菲奥拉从多9元到少12元
所以7KG=21元
1KG=3元

Answer 2

翻译：某人有一些钱，如果买15kg糖，那么差12块；如果买8公斤，则富余9块，问一公斤糖多少钱。
（12+9）/(15-8)=3元/kg