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?
How many books did Mara receive? ** If Roselyn gave Rebecca 40 books, and Mara was given three times as many books, Mara has 3*40 = 120 books.
How many books did Rebecca and Mara receive? ** Rebecca and Mara's total number of books is 120+40 = <<120+40=160>>160 books.
How many books did Roselyn have before? ** If Roselyn gave Mara and Rebecca her books, which is 160, then she initially had 60+160 = <<60+160=220>>220 books.
#### 220