We need to know how much costs each arcade gameplay, and each ferri wheel ride.
Also, we need to know how much she spent in total and the total times that she played arcade games and rode the ferri wheel, together.
For example, if each time he plays arcade games it costs $5
and each ferri wheel rides costs $6
She spent a total of $100
She did both game attractions a total of 10 times
Let assume:
x = number of times he plays arcade games
y= number of ferri wheel rides
5x+6y= 100
x+y = 10
With this system of equations we can calculate the number of times that she played arcade games (x) and the number of rides on the ferri wheel (y)