Answer:
y = 57.2 - 7.15x
Explanation:
Let y represent the number of gigabytes left, and let x = number of games.
Originally, y = 57.2.
Each game will occupy 57.2/8 gigabytes = 7.15 gigabytes.
x games occupy 7.15x gigabytes, so for x games loaded on his computer, the gigabytes left go down by 7.15x.
The equation is
y = 57.2 - 7.15x