Arectangular yard has area 96 square feet. if the width of the yard is 4 ft less than length, what is the perimeter, in feet, of the yard?

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm