###Human: Roselyn gives Mara three times as many books as she gives Rebecca and remains with 60 books. If Rebecca received 40 books, how many books did Roselyn have before?, ### Assistant: If Roselyn gave Rebecca 40 books, and Mara was given three times as many books, Mara has 3*40 = 120 books.
Rebecca and Mara's total number of books is 120+40 = 160 books.
If Roselyn gave Mara and Rebecca her books, which is 160, then she initially had 60+160 = 220 books. 
 So the answer is :  220