X 10 xx3 9 4 8 July 8, 2019 16 32 64 128 8 9 x 3 4 x 10 6 x 12 15 10 x 4 )- 9 x 3 )- 1 8 x 3 4 10 x 3 9 x 2 8 x 1 7 Tìm x x 10 x 3 9 4 8 9 x 8 = 3 x 3 = 9
