2 7 1 4x July 8, 2019 16 32 64 128 2 7 1 4x 21 )=- 3 5x 2 3x 7 1 4x 3 2 7 x 1 4x 2 3x 1 )= 7 4x 2 x 1 )+ 7 4x 3 2 4x 3 7 1 2 1 4x 7 )= 1 3x 4 7 2 1 4x 5 3 2 4 4x 2 )+ 7 1 6x 7 4x 1 )= 6 2 3 14x 5x 2 1 4x 7 Y 7 4x 1 2 7 2x 1 )= 4x 2 7 4x 1 )= 5 2 3 14x 2 7 4x 1 ) 3 15