On the Bologna-Rome route of a high-speed train, 3/4 of the reservations are with departure from Bologna, while the remainder are with departure from Florence, which is the only intermediate stop. In Bologna all the passengers who have booked get on, while in Florence 20 people get on, corresponding to 2/5 of bookings from Florence, and 36 passengers from Bologna get off the train. How many passengers had booked the train? And when the train arrives in Rome, how many passengers are left on board? the answer is 200 and 134 but I would like the procedure to get there.