A man drove at the rate of 50 km/h while outside a cityand 30 km/h while within the city. If a trip 33 km took him 46 minutes, how much of the trip was outside the city?
distance outside city --- x
distance inside city ---- 33-x
time = distance/rate
x/50 + (33-x)/30 = 46/60
solve for x
(I suggest multiplying each of the 3 terms by 300)