Respuesta :

Explanation:

Oscar had 9 books and returned 5 of them, so he has 5 less books:

[tex]9-5=4[/tex]

After returning 5 books he had 4 books. Now he borrowed 2 more:

[tex]4+2=6[/tex]

Answer:

Oscar has now 6 books

RELAXING NOICE
Relax