Andrea made a car trip of 440 kilometers. She averaged 54 kilometers per hours for the first part of the trip and 80 kilometers per hour for the second part. If the total trip took 6 hours, how long was she traveling at 80 kilometers per hour? (I just need help setting up, thanks!)

Question

Andrea made a car trip of 440 kilometers. She averaged 54 kilometers per hours for the first part of the trip and 80 kilometers per hour for the second part. If the total trip took 6 hours, how long was she traveling at 80 kilometers per hour?  (I just need help setting up, thanks!)

badsheep · Answer

Distance for second part = x km 
Distance for the first part = 440-x km 
Total time: 
(440-x)/54 + x/80 = 6 hours. 
Solve for x