Algebra 1: Common Core (15th Edition)

$w\leq18$ any width greater than 0 and less than or equal to 18 feet
$2l+2w\leq96$ $2(30)+2w\leq96$ $60+2w\leq96$ $60-60+2w\leq96-60$ $2w\leq36$ $\frac{2w}{2}\leq\frac{36}{2}$ $w\leq18$