6 3 8 x 4 1 4 July 8, 2019 16 32 64 128 3 4 (- 5x 8 )=- 6 x 4 )+ 1 4x 6 7 8 x 4 1 4 x 3 1 8 2 3 8 1 1 4 x 6 3 4 1 2 4 3 8 x 6 1 4 continental postcard sleeve 4 3 8x 3 )- x 8 1 4x 3 )+ 6 Given the relation r (- 4 2 3 6 x 8 (- 1 4 6 3/4 x 8 6 x 4 / 8