John traveled North from Miami at an average speed of 50 mih

John traveled North from Miami at an average speed of 50 mi/h. Two hours after he left, Sharon left from Miami traveling in the same direction at an average speed of 55 mi/h. How long will it take Sharon to catch up with John?

D=RT
50T=55(T-2)
50T=55T-110
50T-55T=-110
-5T=-110
T=-110/-5
T=22 HOURS.
PROOF:
50*22=55(22-2)
1100=55*20
1100=1100