Elia rode her bicycle from her house to the beach at a constant speed of 181818 kilometers per hour, and then rode from the beach to the park at a constant speed of 151515 kilometers per hour. The total duration of the rides was 111 hour and the distances she rode in each direction are equal. Let bbb be the number of hours it took Elia to ride from her house to the beach, and ppp the number of hours it took her to ride from the beach to the park.