3 4x 6 15 July 8, 2019 16 32 64 128 18 3 (- 4x 6 )= 15 3 - 4x 5 - 6 15 3 4x 8 15x 6 15x 3 6 4x 5 10x 3 4x 2 15x 6 15x 6 )- 3 4x 2 6 4x3 3-4x 15 3 15 x 4
