Wyatt works as a salesperson at an electronics store and sells phones and phone
accessories. Wyatt earns a $10 commission for every phone he sells and a $3
commission for every accessory he sells. On a given day, Wyatt made a total of $60 in
commission from selling a total of 13 phones and accessories. Graphically solve a
system of equations in order to determine the number of phones sold, x, and the
number of accessories sold, y.