Question 133300
Given: total distance 22 miles, total time 3 hours. Part of the trip is made at 35mph, the remainder at 6mph.

Let t be the time spent walking. Then the time on the bus is {{{(3 - t)}}}

The DistanceWalking is given by {{{d = v * t}}} ==> {{{d = 6t}}}
The DistanceRiding is given by {{{D = 35 * (3-t) }}}

Distance = DistanceWalking + DistanceRiding 
{{{22 = 6t + 105 - 35t}}}
{{{83 = 29t}}}
t = 2.862 hours

Check your answer.
Does 22 = 6(2.862) + 35(3-2.862)?