A rectangular painting's width is 6 less than twice its length. Given that the perimeter of the painting is 84 inches, select all statements that are true(along with explanation)
The painting’s length is 16 inches.
The painting’s length is 30 inches.
The painting’s width is 26 inches.
The painting’s length is 54 inches.
The painting’s area is 416 square inches.
The painting’s length is 1620 square inches.