help Andre rides the first half of a bike race in two hours. If his partner Adam, rides the return trip, five miles per hour less, and it takes him three hours

Question

Andre rides the first half of a bike race in two hours. If his partner Adam, rides the return trip, five miles per hour less, and it takes him three hours, how fast was Andre traveling?

 

 

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Answer 1

D = 2 V where V is Andre's speed

D = 3 (V-5) , because it takes Adam 3 hours to travel the same distance 5 mph slower

2V = 3(V-5)

2V = 3V - 15

-V = -15

V = 15