Your equation should be:
4 + 6x = 22
This is so because he only bought one movie, but he bought "some" video games. The variable x represents some in the problem.
Solve the equation.
4 + 6x = 22
Subtract 4 from both sides of the equation.
6x = 18
Divide both sides by 6.
x = 3
Marcus rented 3 video games.
Solution :
D. 4 + 6x = 22
B. 3 video games