7x 4x 3 2x 6 July 8, 2019 16 32 64 128 4x 3 2x 5 6x 7 ≤ 7x 2 7x 3 4x 1 )+( 2x 2 6x 2 (- 4x 2 9x 3 2x 6x 3 7x 2 4 7x 1 )= 3 2x 1 )-( 4x 6 7x - 4 6(3x-2)