1) If you want to rent a car, please design all possible ways to rent a car.
2) If the rental expenses of car A and car B are 8000 yuan and 6000 yuan respectively, please choose the most economical rental scheme.
Solution: (1) If X cars of Class A are rented, then 8-x cars of Class B are rented.
4x+2﹙8-x﹚≥30
3x+8﹙8-x﹚≥20
Solution: 7≤x≤8.8
∵x is a positive integer,
∴ x = 7 or x = 8
So there are two schemes for renting a car.
① Rent 7 Class A cars, 1 Class B car. ..
② Rent 8 A-class cars.
(2) ① 8000× 7+6000× 1 = 62000 yuan
② 8000× 8 = 64000 yuan
Answer: According to the calculation, it is more economical to rent seven A-class cars and 1 B-class cars, which costs 62,000 yuan.