Question 972803
A person drives to a destination at a rate of thirty mph and returns over the same route at fifty mph. How far is the destination if the time returning is one hour less than the time going? 
===============
d = r*t
d = 50t = 30(t+1)
50t = 30t + 30
t = 1.5 hours
d = 50*1.5 = 75 miles