X 3 7x 9 0 July 8, 2019 16 32 64 128 X 3 7x 2 15x 9 0 X 2 9 + x 3 7x 6 = 0 X 3 7x 2 17x 9 0 X 4 4x 3 6x 2 7x 9 0 X 3 9=7
