Question

A ranch is 7680 acres. It is a rectangle that is a mile longer than it is wide. What are the dimensions of the ranch?
Kuai

I am not sure that it is right to do it.
L = w + 1

p = 2 l + 2w

p = 2(w + 1) + 2w
12 = 2w + 2 + 2w
12 = 4w + 2
10 = 4w
w = 2.5
l = 3.5

length is 3.5 mile
Wide is 2.5 mile