Question 1157793
<pre>
                    SPEED      TIME       DISTANCE

Kathy did              n        d/n         d

for speed needed      n+x       d/(n+x)     d

Difference                        3
</pre>
{{{highlight_green(d/n-d/(x+n)=3)}}}
Solve for x or find  x+n.


The speed NEEDED was  supposed to be {{{(dn)/(d-3n)}}}.