How long did he take?

Question

Nickola swam at a rate of 22 ​km/hr and ran at a rate of 11 km/hr for a total distance traveled of 68.5 km. If he completed the race in 9.5 hours, how long did he take to complete each part of the​ race?

Answer 1

t = d/r

t_swim = d/22

t_ran = (68.5 - d)/11

t_swim + t_hike = 9.5

d/22 + (68.5 - d)/11 = 9.5

Can you solve for d and answer?