5 9 x 12 7 July 8, 2019 16 32 64 128 7 12 5 9 x 3 8 19 15 7 12 5 9 x 3 8 chia 19 15 2 3 x 5 9 7 12 5 9 12 5 9 x 125 729 7 x 9 5 12 4 2 5 3x 9 )- 12 12 7 x 9 12 9 x 6 5 2 7 5 8 x 9 77 − 12 3x 11 9 solve for x x/12 - 5 = 7 5 9 x 12 7 bằng bao nhiêu
