Answer:
9 hours
Explanation:
Dylan: r=14, t=t, and d= d
Ethan: r=22, t=t, and d=324-d
d = rt = t=d/r
Dylan: t=d/14 and Ethan: t= (324-d)/22
t = t
d/14 = (324-d)/22 (cross multiplication)
22d = (14)*(324-d)
22d = 4536 - 14d
22d + 14d = 4536
36d = 4536
d = 4536/36
d = 126 miles
Dylan: 126/14= 9 and
Ethan= (324-126)/22 = 9