4 2x 3 )- 7 8x 5 July 8, 2019 16 32 64 128 4 2x 8 )- 7 8x 3 )= 53 1 2x 3 4 5 8x 7 8 2 7x-2 8=4 2-4 3x 4 7x-1 8=3 2+2 2x 5 x 7 = 35