Frank is going to an amusement park that costs $36.00 to get into. Treats, like cotton candy, caramel apples, and funnel cakes cost $4.00 each. Frank does not want to spend more than $52.00 in all. Solve for x, where x equals the number of $4.00 treats Frank can buy.

4x + $36.00 ≤ $52.00