Answer :
Adjacent means connected to so you are looking for the width.
Perimeter = 2(length) + 2(width)
P = 2l + 2w
46 = 2l + 2w
l = 14
46 = 2(14) + 2w
46 = 28 + 2w
18 = 2w
9 = w
Width: 9 inches
Perimeter = 2(length) + 2(width)
P = 2l + 2w
46 = 2l + 2w
l = 14
46 = 2(14) + 2w
46 = 28 + 2w
18 = 2w
9 = w
Width: 9 inches