0 5 x 2 9 x 8 July 8, 2019 16 32 64 128 X 5 4 8 x 5 2 9 0 0 5 x 2 9 x 8 bằng bao nhiêu 0 9 x 5 (2 5+x) 9=0 8 2 5 x 0 9 9 5 x 8