Width = x
Length = 2x+1
1/2 the permiter = l + w
1/2 perimeter = 176 /2 = 88
so we have x + 2x+1 = 88
combine like terms:
3x +1 = 88
subtract 1 from both sides:
3x = 87
divide both sides by 3
x = 87 / 3 = 29
with = 29 feet
length = 29 x 2 = 58 +1 = 59 feet
check: 59 +59 +29+29 = 176