MATH
posted by mercy on .
Andrea made a car trip of 440 Kilometers. She averaged 54 Kilometers per hour for the frst part of the trip and 80 kilometers per hour for the secound part. If the total trip took 6 hours, how long was she traveling at 80 kilometers per hour?

See response in:
http://www.jiskha.com/display.cgi?id=1330042402 
54.x+80.(6x)=440
(5480).x+480=440
26x=40
x=40/26=1,538
6x=4.46 hours