The number of soda bottles Katie bought is 6
The given parameters are:
- Large Pizza = $14.99
- Soda = $1.50 per bottle
- Total cost = $23.99
Assume the number of soda bottle is x.
So, we have:

This gives

Subtract 14.99 from both sides of the equations

Divide both sides of the equations by 1.5

Rewrite the equation as

Hence, the number of bottles is 6
Read more about linear equations at:
brainly.com/question/14323743