Math 1 unit 3 test a the length of the rectangle is one less than twice the width. if the perimeter is 34 what is the length

If the Length of the rectangle is one less than Twice the Width, you'd first need to Figure out the Width of the Rectangle.
L = 2W - 1 (L = length, W = Width)
34 = 2l + 2w = 2(2w-1)+ 2w, 34 = 6W - 2 / w = 6
So then you'd need to take the Width, Double It, and then Subtract one.
6*2=12, 12-1 = 11.
so Perimeter = 34, Length = 11 & Width = 6.