Question 931350
w for width around the square garden.
Total area garden & border, {{{(2w+3)^2}}};
Garden alone, {{{3*3}}};
Border area excluding garden, {{{(2w+3)^2-3*3}}}.


WANTED:  Garden area equals border area.
{{{highlight_green((2w+3)^2-9=9)}}}, and you just want to solve for w.



{{{highlight(w=(-3+3sqrt(2))/2)}}}