You can put this solution on YOUR website!
A bicyclist rode into the country for 5 h. In returning, her speed was 5 mi/h faster and the trip took 4 h. What was her speed each way?
time=5 hr. ; rate = x mph ; distance=5x miles
time=4 hr. ; rate= x+5 mph ; distance=rt = 4(x+5)=4x+20 miles
distace out = distance back
5x = 4x+20
x=20 mph (speed on the way out)
x+5=25 mph (speed on the way back)