7 3 4 x 2 4 9 July 8, 2019 16 32 64 128 7 8 3 4 x 2 9 7 x 3 4 x 2 9 4 3 7 5 * x 1 2 4 9 1 5 3 4 x 7 9 x 2 1 4 1 4 3 x )- 0 9 x 2 )= 4 7 5 4 x )- 7 (- x 2 )= 4 9 3 7 12 3 4 x 2 9 bằng bao nhiêu 4/7 x = 7 3/7 7 - 3 4/9 =
