Question 256189
d=rt
d=30t for the bus.
d=45(t-2) for the car.
Set the distances equal.
30t=45(t-2)
30t=45t-90
30t-45t=-90
-15t=-90
t=-90/-15
t=6 hours after the bus leaves they will be the same distance from the city.
Proof:
30*6=45(6-2)
180=45*4
180=180 miles from the city after 6 hours.