Question 982822
{{{15>=something}}}.


Let p be the number of packages of cookies.


{{{5.5+7.75+(0.25)p<=15}}}, the left member being what is to be spent.


{{{p/4<=15-5.5-7.75}}}
{{{p<=(15-5.5-7.75)*4}}}
{{{p<=2*4}}}
{{{highlight(p<=8)}}}


Maximum count of cooky packages she can buy is 8.