I'm assuming your trying to find how much pizza he has left.
You need to subtract the two fractions because the denominators are already the same.
When subtracting fractions, you leave the denominator and regularly subtract the numerator.
Your answer will be 2/8 which equals 1/4th
Answer:

Step-by-step explanation:
Given


Required
Determine the equilibrium price
This is determined when Demand = Supply
So:

Collect Like Terms


Solve for x


<em>Hence; The equilibrium price is when x = 52.00</em>