Question 645671
Paul and Randy are taking a trip.
 Paul drives at 85mph. Randy drives at 90mph. 
 Randy drove three hours longer than Paul. 
 All together they covered 970 miles. How long did each person drive.
:
Let t = Paul's driving time
then
(t+3) = Randy's driving time
:
Write a dist equation; dist = speed * time
85t + 90(t+3) = 970