A shoe factory produces 70 thousand pairs of leather shoes this year, 20 thousand pairs less than 2 times of last year, how many thousand pairs of leather shoes were produced last year?

45,000 pairs

Questions 2

Town X and Town Y are 550 kilometers away from each other. Car A and Car B both start from the two towns at the same time, heading toward each other at a speed of 78 kilometers per hour. How many hours later, the two cars are 43 kilometers apart?