Posted by todd on .
The speed of a passenger train is 16 mph faster than the speed
of a freight train. The passenger train travles 300 miles in
the same time it takes the freight train to travel 220 miles.
find the speed of each train

algebra 
Reiny,
speed of freight  x mph
speed of passenger  x+16 mph
freight can go 220 miles in 220/x hours
pass. can go 300 miles in 300/(x+16) hrs
but those times are the same ....
220/x = 300/(x+16)
crossmultiply
300x = 220x + 3520
80x = 3520
x = 44
the freight goes 44 mph and the passenger train goes 60 mph