7 1 3 6x 3 July 8, 2019 16 32 64 128 2x 3x 3 )+ 7 1 6x 7 4x 3x 5 6x 1 2x 3 4x 3 6x 1 )- 7 4x 3 )= 10 2x 7 6x 3 1 3 6x 4x 7 6x 4 3 =- 1 3 1 3 6x 3 )+ 2 x 1 )=- 7 1 3 6x 30 )= 4x 2 x 7 3 6x 1 )- 7 1 3x )= 68 7 2x 3 2 1 6x 43 3 1 6x 7 3 13 3