Question 992723
<pre>
ONE DAY
rate      time      distance
x         24/x        24
y         40/y        40
Total      9

NEXT DAY
rate       time      distance
x          18/x       18
y          48/y       48
Total       9
</pre>



The time expressions are filled according to {{{RT=D}}};
{{{RT/R=D/R}}}
{{{T=D/R}}}.


The two time sum relationships for the two days give the system 
{{{system(18/x+48/y=9,24/x+40/y=9)}}}


You can solve that system, ... unless you need help with the algebra or arithmetic steps.



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Many long steps on paper; but found x=6 and y=8.