5 6 2x 1 )- 4 3x 8 July 8, 2019 16 32 64 128 3 2x 1 )- 5 x 3 )+ 6 3x 4 )= 83 3x 4 6 2x 4 5 5x 1 8 (5 6-8x) 4=1 2