X 2 4 9 x 7 6 July 8, 2019 16 32 64 128 X 4 9 2 3 x 6 7 4 9 x 3 8 x 2 7 x 1 6 5 6 x 2 9 x 4 9 x 6 7 2 1 7 x 2 4 9 x 2 6 11 9 1 x 6 3 )/( 4 2 x 7 6 2 x 7 5 x 9 x 3 4 x 7 6 2 ⋅ ( 7 + 9 x ) = − 6 x + 2