2 x 4 ) 7 19 July 8, 2019 16 32 64 128 2 x 4 )+ 7 19 7 4 x 2 6 19 4 x 7 2 35 =- 19 4 x 7 2 4x 2 56x 196 196 x 2 7 4 7 2 2 x 4/7 2x 7 2 7x4
