2 9 x 2 3 5 9 July 8, 2019 16 32 64 128 3 x 2 9 )+( x 2 9 5 x 1 1 2 9 x 2 1 3 2 3x 5 4 9x X 2 9 9 4x 2 x 3 3 2x 5 4 2 x 2 5 2 9+x=3 5