Question 948277
P = L + W + L + W = 2L + 2W
So the perimeter = 68
Thus, 68 = 2L + 2W

L = 3W

Substitute that new equation in: 

68 = 6W + 2W
68 = 8W
W = 8.5 inches 

L = 3W = 3(8.5) = 25.5 inches

Thus, the length is 25.5 inches and the width is 8.5 inches.