A car drives from a to B at the speed of B km / h in a hour. The distance between a and B is () km
Distance: a * b = AB km
Distance = time × speed = a * B
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Mileage: less than 1.4km (including 4km) charge: 8 yuan for the part above 2.4km charge: 1.2 yuan for every 1km increase. If the mileage of taxi is x (km) (x is an integer greater than 4km), please use the algebraic formula about X to express the fare
8+1.2﹙x-4﹚=1.2x+3.2
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