Question 1070457
<pre>
               SPEED        TIME        DISTANCE
GOING           r            1.8          d
RETURN          r-7          2            d
</pre>

d is distance both ways, the same for each.
{{{r*1.8=(r-7)(2)}}}


{{{1.8r=2r-14}}}

{{{0.2r=14}}}

{{{r=14/(0.2)}}}

{{{highlight(r=70)}}}------Monday, going to.

{{{highlight(r-7=63)}}}------Tuesday, returning from.