At the first stop on its route, a bus picks up x passengers. At the second stop, y passengers get on the bus. At the third stop, 2/3 of the passengers exit the bus. At the fourth stop, 2 passengers get on the bus. How many passengers is the bus carrying right now? a) (3x+3y+4)/3 b) (2x-2y-4)/3 c) (6-2x-2y)/3 d) (x+y+6)/3 e) (3x+2y+6)/3 I'm jux wondering hwo can u do this by using PLUG INS....... thanks a lot..... btw the answer is D.