Solution:
Note that:
- Clue: Latoya baked b cookies, her family ate 13 of them.
Let's reread the clue carefully.
{Latoya baked b cookies}, {her family ate 13 of them.}
↥ ↥
b -13
If we put them together, the expression formed is b - 13.
The expression that represents the number of cookies is b - 13.