ANSWER
C = 20x
EXPLANATION
It costs $20 per person to get into Six Flags.
This means that each person pays $20.
Let the total number of people that get into the park be x.
To find the equation that represents the total cost of getting into the park, we have to multiply the cost per person with the total number of people.
Let C represent total cost.
This means that:
C = 20 * x
=> C = 20x
That is the equation.
