Let g be the number of games. The cost for Wayne is:

C(g) = Cost per game * number of games + shoe rental

4.25g + 1.90 = C(g)

We're given C(g) = 20, so we have:

4.25g + 1.90 = 20

Using our equation solver for g, we get:

g = 4.25

We need whole games, we we round down to

**4 games**