Question20) The width of a rectangle is 2 units less than the length. The area of the rectangle is 15 square units. What is the length, in units, of the rectangle? $$(x(l-2)=15$$ 21) The difference of the square of a number and 40 is equal to 3 times that number. Find the positive solution. 22) The width of a rectangle is 2 units less than the length. The area of the rectangle is 48 square units. What is the width, in units, of the rectangle?