Answer:
$8.5
Explanation:
We need to propose a system of equations with the information provided to us.
two large pizzas and one small pizza cost $36:

where
: Large pizza
Small pizza
and the difference in cost between a large and small pizza is $5.25:

our system of equations is:


We are asked for the price of small pizza, so we must manipulate the equations in such a way that adding or subtracting them removes the variable L and we are left with an equation for S.
Multiply the second equation of the system by -2

and now we sum this with the first equation of the system:

simplifying the result:

and solving for S (the price of a small pizza)
