7x 3 9x 8 4x 6 July 8, 2019 16 32 64 128 7x 3 4x 8 6x 12 9x 7x 3 9x 2 7x 8 )-( 8 4x 2 6x 3 7x 3 4x 8 ≤ 6x 12 9x
