What is the solution to problem in book Walk Two Moons?

The main problem in the book Walk Two Moons is the death of Sal's mother. Sal is struggling to come to terms with her grief and understand why her mother had to die. Throughout the book, Sal goes on a journey with her grandparents to visit her mother's grave and learn more about her past. Along the way, she meets several people who help her to understand her mother and start to heal. By the end of the book, Sal is able to accept her mother's death and move on with her life.