algebra
posted by Mary .
A passenger train's speed is 60 mi/h, and a freight train's speed is 40 mi/h. The passenger train travels the same distance in 1.5 h less time than the freight train. How long does each train take to make the trip?

Let D=distance
Time for passenger = D/60
Time for freight = D/40
"The passenger train travels the same distance in 1.5 h less time than the freight train. "
D/40  D/60 = 1.5
Can you complete the rest?