The length of a rectangle is 3cm greater tan the width. If each dimension is increased by 2cm, the area is increased by 26cm². Find the original dimension of the rectangle.

Ok.. i wrote this to try to solve it but somewhere along the line im wrong and keep getting the wrong answer..can someone please show me what im doing wrong

(w + 2) (l + 2) = a + 26

(w + 2 + 3) (w + 2) = (w + 3) (w + 26)