The length of a rectangular garden is three feet less than twice it's width. If the perimeter of the garden is 42 feet, what is its length

Let the width be x

Width = x

Length = 2x - 3

Perimeter = 2 (Length + Width) = 2 (x + 2x - 3) = 2 (3x - 3) = 6x - 6

Given that the Perimeter is 42 feet,

6x - 6 = 42

6x = 42 + 6

6x = 48

x = 8

Width = x = 8 feet

Length = 2x - 3 = 2 (8) - 3 = 13 feet

Answer: The length is 13 feet.