4 1 2 7x 6 July 8, 2019 16 32 64 128 4 1 6 7x 2 10 4 X 2 7x 6 7x 1 4 1 3x 4 )-( 6 2 7x 6x 4 7x 2 1 0 7x 4 1 2 38 6x 6 4 3x 1 )- 7x 6 5x 2 6x 4 7x 2 6x 1 2x 3 15 2x 6 1 2 7x 4 1 2 6x 4 )- 2 7x 3 )=- 29 1x 2 7x 6 7x 1 4 2 6x 1 4 7x − 3