Wallace has a $50 bill. Pizza pies cost $12.25 each. If p represents the number
of pizzas he buys, write an expression for
the change he receives.

50-12.25p

This expression will give you the change he will receive after purchasing p amount of pizzas.

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.