SOLUTION: Three friends, Anna, Vaso and Yianna went to the library of the school in order to borrow some books. All together borrowed 15 books. After a few days Anna returned to the library

Question 1135373: Three friends, Anna, Vaso and Yianna went to the library of the school in order to borrow some books. All
together borrowed 15 books. After a few days Anna returned to the library 1 book, Vaso returned 2 books and
Yianna returned 3 books. After the returns , the three friends has the same number of books from the library.
How many books did Yianna borrowed at the beginning?
Answer by josgarithmetic(39623) (Show Source): You can put this solution on YOUR website!
------------the second equation is really TWO equations.
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