6 3 x9 7 4 8 2 July 8, 2019 16 32 64 128 2x 6 7 3 4 x 9 8 X 1 9 x 2 8 x 3 7 x 4 6 −9 6 + 8 7 3 9 / (7 8 - x) = 3 6