Question 1046151
KNOWN:
g, rate going to work
b, rate returning from work
t, total driving time in HOURS
UNKNOWN:
d, distance between home and work


Travel Rates Rule, RT=D to relate rate, time, distance

<pre>
               SPEED       TIME       DISTANCE
GOING            g                      d
RETURN           b                      d
TOTAL                       t          2d
</pre>

Two time cells are not filled but they can be so using the basic travel rate rule.

<pre>
               SPEED       TIME       DISTANCE
GOING            g         {{{d/g}}}          d
RETURN           b         {{{d/b}}}          d
TOTAL                       t          2d
</pre>
The obvious equation to make is  {{{highlight(d/g+d/b=t)}}} and the only unknown variable is d, the variable which needs to be solved for.