Answer:
Gia started with 4 books.
Step-by-step explanation:
Let Gia got B books from the library yesterday.
She got five books after returning three, so the expression for the books will be (B - 3 + 5).
Gia now has number of books = 6
Therefore, The equation will be
(B - 3 + 5) = 6
B + 2 = 6
B + 2 - 2 = 6 - 2
B = 4 Books
Therefore, Gia started with 4 books.