2 3 x 5 )- 1 4 x 2 )= 9 2 July 8, 2019 16 32 64 128 2 3 x 5 )- 1 4 x 2 )= 9 2 verify 2 3 x 5 )- 1 4 x 2 )= 9 2 solution 2 upon 3 x minus 5 minus 1 upon 4 x 2 9 2 1 x 1 2 2 x 5 2 3 x 7 2 4 x 9 2 2 x 2 5