Let x = the number of games. The problem can be rewritten as a system of equations:
Person 1 = 72.48 + 6x
Person 2 = 18.08x
We are looking for when the number of games for both are the same; so:
72.48 + 6x = 18.08x
Then:
72.48 = 18.08x - 6x
72.48 = 12.08x
x = 72.48/12.08
x = 6