Question 1191917
<pre>
           SPEED          TIME,hours      LAWNS

Wilma       1/3               3             1

Kyle        1/x               x             1

Combined    1/3+1/x           2             1
</pre>
{{{1/2=1/3+1/x}}}

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simplest common denominator is 6x.
{{{6x(1/2)=6x(1/3+1/x)}}}


{{{3x=2x+6}}}


{{{highlight(x=6)}}}