The perimeter of a rectangle is 220 inches. The length exceeds the width by 78 inches. Find the lenght and the width.
(1) 2L + 2W = 220
(2) L - W = 78
Double #2:
2L - 2W = 156
Add #1 and #3
4L = 376
Divide #4 by 4 for L; then subtract 78 for W