9 15 x 5 6 July 8, 2019 16 32 64 128 8 9 8 15 x 5 6 7 15 5 6 x 9 10 9 15 x 4 10 x 5 6 5 6 9 15 x 40 67 9 x 5 15 9 15 2 x 5 x 6 1 3x 6 14 15 x 9 21 x 5 6 5 x 9 )- 6x 15 15 /9 ×6 5 + 9 = 14 9 × 5/6 5 9x15 15 x 9 =
