We are unsure what the last blank - blank = blank answer would be

Answer:
Given that,
There are 12 cookies in each box,
There are 3 boxes.
Total number of cookies are
[tex]12\times3=36[/tex]Each of her friends received 6 cookies.
Number of friends is,
[tex]=\frac{36}{6}=6[/tex]Katie shared her cookies with 6 friends.