7x 4 8 2x July 8, 2019 16 32 64 128 $3x 2 x 4 7x 2x 8 7x 4 x =- 2x 8 3x 7x 4 x =- 2x 8 3 7x 2x 4 8 3x 7x 2x 4 8 3 3x 2 3x 38 =- 7x 4 2x 8 4 2x 8 )= 7x 3 2x2 7x 4 x2 8 4m 7x 4 5m 8 2x