Yes she does, shes also a great teacher for putting in the work for the production if the play.
Basically solve for y
minus 5x fromboth sides
-15y=-5x-60
divide both sides by -15
y=1/3x+4
Number of runners needed = 1 1/2 / 1/4
= 3/2 / 1/4
= 3/2 * 4
= 12/2 = 6 runners (answer).