Question

John walked 10 miles on Saturday. He walked twice as fast on the second 5 miles of his walk then he walked on the first 5 miles of his walk. Which expression represents the time he spent walking? Let X = John's speed on the first half of his walk.

Answer 1

since time = distance/speed, we have 

5/x + 5/(2x) = 15/(2x)

Answer 2

15/2x Hope I helped took a long time to figure this out