Question 1139679
<pre>
                 SPEED           TIME          DISTANCE

GOING               45            d/45           d

RETURNING           63            d/63           d

TOTAL                             12
</pre>
{{{d/45+d/63=12}}}


Solve for d, and evaluate {{{d/45}}}.


--

{{{7*5*9(d/45+d/63)=7*5*9*12}}}

{{{7d+5d=12*7*9*5}}}

{{{12d=12*7*9*5}}}

{{{d=7*9*5}}}

{{{highlight_green(d=315)}}}


Time going to, was  {{{highlight(highlight(7))}}}  hours.