SOLUTION: A jet travels 1102 mi against a jetstream in 2 hours and 1262 mi with the jetstream in the same amount of time. What is the rate of the jet in still air and what is the rate of th

u - v =     (1)   ("A jet travels 1102 mi against a jetstream in 2 hours")
v + v =     (2)   ("and  1262 mi with the jetstream in the same amount of time.")

Or

u - v = 551,
u + v = 631.
----------------Add

2u = 1182,  u =  = 591 mi/h  is the rate of the jet plane in still air.

Then v = 631 - 591 = 40 mi/h  is the rate of the jetstream.