Question 1003607
p kittens;

Half p to pet store,  {{{p-p/2}}} remain.


Gave half of that to neighbor, {{{(p-p/2)-(1/2)(p-p/2)}}} remain.


Gave half of that to best friend, {{{(p-p/2)-(1/2)(p-p/2)-(1/2)((p-p/2)-(1/2)(p-p/2))}}} remain.



Kept 1 remaining cat for herself.
{{{(p-p/2)-(1/2)(p-p/2)-(1/2)((p-p/2)-(1/2)(p-p/2))=1}}}
Solve this equation for p.


Some careful use of Distributive Property, careful use of common denominator to form like-terms, then some additions and subtractions.