20 kg of apples and 30 kg of pears cost 132 yuan in total. The price of 2 kg of apples is equal to that of 2.5 kg of pears. How many yuan per kg of apples and pears?
132 ﹣ 10 ﹣ 10 (2.5 + 30 ﹣ 10) = 13.2 ﹣ 5.5 = 2.4 (yuan) 2.5 × 2.4 ﹣ 2 = 6 ﹣ 2 = 3 (yuan) a: 3 yuan per kilogram of apples and 2.4 yuan per kilogram of pears