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Mathematical problems about sixth-grade driving
1. Party A and Party B respectively drive to place C (place C is in the middle of the two places), and the journey is 14 hours. The distance between a and b is 650 kilometers. It is known that Party A travels 55 kilometers per hour and Party B travels 40 kilometers per hour. How many hours does each party take?

Let line A be x hours, then line B is 14-x hours. The equation obtained is:

55x+40( 14-x)=650

15x+560=650

15x=90

x=6