4x 7 =- 2 x 1 ) 3 x 4 July 8, 2019 16 32 64 128 4x 7 =- 2 x 1 )+ 3 x 4 4x 7 2x 1 x 3 x 4 68x 4x 1 2 x )- 5x x 3 10 )= 7 4 4 7x-1 8=3 2+2 2x 4 x 4 x 4 x
