7x 3 9 x July 8, 2019 16 32 64 128 7x 3 2x x 9 2x2 7x 3 x2 9 1 7x 2 3 x )= 9 2x 7x 3 x 9 1 7x 3 x 9 7 x 7x 3 x 4x 9 5x X 3 7x 9 0 7x 9 3 9x 3 5x 7x 9 x 7x 3 9 9x 2x 6 11 7x 3 9 2x x 5 7x 9 3 9x comprobación