If a rectangle has a perimeter of 70, a length of x and a width of x-9, find the value of the length of the rectangle. a)4, b)31, c)13, d)22

The answer is D) 22
X = 4
Length = 4
Width = - 5
Perimeter = 8 + -10
Perimeter = - 2

X = 31
Length = 31
Width = 22
Perimeter = 62 + 44
Perimeter = 106

X = 13
Length = 13
Width = 4
Perimeter = 26 + 8
Perimeter = 34

X = 22
Length = 22
Width = 13
Perimeter = 44 + 26
Perimeter = 70