Question 1135455
<pre>
               SPEED      TIME       DISTANCE

GOING             16        x          d

RETURN            26        x-3        d

DIFFERENCE                  3
</pre>

{{{system(16x=d,26(x-3)=d)}}}

-

{{{16x=26x-78}}}

{{{26x-16x=78}}}

{{{10x=78}}}

{{{x=78/10}}}

about 7 hours 48 minutes