7 1 2 x 5 1 4 July 8, 2019 16 32 64 128 7 1 2 x 5 3 4 7 1 6 x 2 5 6 1 4 6 7 1 2 x 5 2 5 2 x 1 4 9 8 1 2 x 5 1 4 x 7 7 4 x 5 6 1 2 1 3 3 1 2 x )- 5 x 1 10 )=- 7 4 (- 1 5 2 ) ( x 7 10 )=- 1 4 4x 7 2 2x 5 )( x 1 )=- 1 Y 1 2 x 5 3 7 4 1 2 7 x 5 1/4 7 1/2 x 5 1/2 7 1/5 x = 7 1/2 7 1/2 x 1 5/9