Question 1210597
Only checked the description and question carefully, followed stepwise and made two equations but 
have not yet tried to solve them.

<pre>
                Noah          Liam              TOTAL

START             n           540-n              540


SOLD SOME x       n-x         (540-n)-x+2x/5
Noah
</pre>

Noah found that {{{n-x=(2/3)x}}}.


Another described post-sale condition
{{{(540-n)-x+(2/5)x=(4/7)(n-x+(540-n)-x+(2/5)x)}}}