Answer:
The width is 19 units. The length is 21 units.
Explanation:
W=width: L=length=W+2; P=perimeter=80
P=2(L+W)
80=2(W+2+W)
40=2W+2
38=2W
19=W answer 1: The width is 19 units.
L=W+2=21 ANSWER 2: The length is 21 units.
CHECK:
P=2(L+W)
80=2(21+19)
80=2(40)
80=80