Mandy and her friend Sarah are knitting scarves for the homeless. Mandy had already completed 5 scarves and has committed to making 3 more scarves per day. Sarah, who hasn't completed any scarves yet, has more free time and can make 4 scarves per day. At some point, Sarah will catch up and they will both have completed the same number of scarves. How long will that take?
Write a system of equations, graph them, and type the solution.