Question 1054546
<pre>
                           SPEED         TIME           DISTANCE

Fairbanks to Coldfoot      30             x               d

Coldfoot to Deadhorse      20             y               d

TOTAL                                  {{{13&1/4}}}
</pre>



Further thinking should or can give you this:
<pre>
                           SPEED         TIME           DISTANCE

Fairbanks to Coldfoot      30            {{{d/30}}}             d

Coldfoot to Deadhorse      20             {{{d/20}}}               d

TOTAL                                  {{{13&1/4}}}
</pre>
One very obvious sum equation:
{{{d/30+d/20=13&1/4}}}