A rectangle has perimeter 72 cm and length 2 cm more than its width. Find its width.
Note
Draw the rectangle mentally and let its width be x. Let width be x and length x+2. Then 2(x+x+2)=72, so width = 17 cm. The perimeter formula is 2(length + width), so both the length and width must be included inside the brackets. After solving, the width is 17 cm.