7 x 4 2x 1 July 8, 2019 16 32 64 128 X 7 4 2x 1 2 3 x 7 )= 4 2x 1 7 x 4 )= 5 2x 3 )+ 11 2x 7 x 4 15 14 7x 4 2x 19 7x 4 2x 1 =- 7 7x 4 2x 14 7 2x 4 1 x 2 3 2 x 7 )- 3 2x 4 )=- 18 7 (- 1 x )= 2 3x 4 )- 2x 7x 4 2x 16 7x 4 2x 1 x 2 7 x 4 49 2x 1 7 x − 4 )= 2x 12