Think about solving problems:
Divide the money spent by 3 to get the total money of 1kg apple and 1kg pear. If you subtract 1 kg of apples from this total amount, it is the amount of money per kg of pears.
Answer:
Solution: (20-7.4) ÷ 3-2.4 =12.6 ÷ 3-2.4 = 4.2-2.4 =1.8 (yuan)
A: Per kilogram of pear 1.8 yuan.