Question 1184335
{{{X<6}}}, Jenny's time
<pre>
               SPEED       TIME      DISTANCE
Jacob          50           6        50*6
Jenny          70           X        70X
Separation                           440
</pre>
{{{70X+50*6=440}}}


{{{70X=440-300}}}

{{{X=(440-300)/70}}}

{{{X=(44-30)/7}}}

{{{X=14/7=highlight(2)}}}