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