3 8 x 1 5 9 July 8, 2019 16 32 64 128 3 4 x 1 5 x 8 9 9 x 1 2 8 * 3 x 1 5 0 1 15 x )* 3 8 9 5 3 3 8 x 1 1 3 2 5 9 8 1 3 x 5 9 10 Tính 3 4 x 1 5 x 8 9 1 5 8 x 3 9 16 5 5 6 3 8 9 x 1 3 x-5=x+3 3 x 3 = 9
