Question 1058303
w Width and L length;
{{{L=w+8}}}


{{{(w-2*2)(L-2*2)*2=690}}}


{{{(w-4)(w+8-4)*2=690}}}


{{{2(w-4)(w+4)=690}}}


{{{w^2-16=345}}}


{{{w^2=345+16}}}


{{{w^2=361}}}

{{{highlight(w=19)}}}