Solve by writing a inequality

The length of a rectangular yard is 30 meters. The perimeter is at most 90 meters. describe the width of the yard

So since the perimeter is 90 then we will subtract 60 since the length is 30 but we will subtract another 30 from length. so you have 30 meters left so we divide 30 by 2 which is the 15. The width is 15