A picture frame has a perimeter of 40 inches. Its length is 2 inches greater than one-half its width. Let w represent the width of the picture frame, and let l represent the length. Which system of equations can be used to find the dimensions of the picture frame?
2l+2w=40
l=2+1/2w
2l+2w=40
l=1/2w-2
lw=40
l=1/2w-2
lw=40
l=2+1/2w