In October, 2009, the new taxi fare adjustment scheme that Shenzhen citizens had been looking forward to for five years was finally implemented. The charging standards of Shenzhen red taxis before and after the price adjustment are as follows: the starting price before the adjustment is 12.5 yuan /3km, and the mileage price after 3km is 2.4 yuan /km, and the air fare will not be recovered; After adjustment,

1 Before adjustment: 12.5 (10-3)×2.4=29.3 yuan; after adjustment: 10 (10-2)×2.4=29.2 yuan; underpayment: 29.3-29.2=0.1 yuan 2. When the total mileage is x kilometers, it is the same as changing cars (x-25) (10.3) × 2. …