Question 1042314
<pre>
           RATE      TIME           DISTANCE
WALK        r         t               5
RIDE       r+10       {{{t-1&1/3}}}         5
TOTAL                 {{{1&1/3}}}
</pre>


{{{system(rt=5,(r+10)(t-1&1/3)=5)}}}




ALTERNATIVE ATTEMPT AT ARRANGING DATA
<pre>
            RATE       TIME        DISTANCE
WALK         r          x           5
RIDE        r+10        y           5
TOTAL                {{{1&1/3}}}


From which you can modify to 
-
            RATE       TIME        DISTANCE
WALK         r          {{{5/r}}}           5
RIDE        r+10        {{{5/(r+10)}}}           5
TOTAL                {{{1&1/3}}}
</pre>

And this allows time sum equation  {{{5/r+5/(r+10)=1&1/3}}}



You can decide which way is best or easier, and then solve.