5 1 2 7x 4 July 8, 2019 16 32 64 128 5 7x 2 1 4x 1 2 5 7x 8 4x 6 5 14 2 7x 1 5 42 1 5 7x 5 9 2 4 9 3x 1 2 x 7x 5 )= 4 5 4x 2 1 7x 3 1 5x 4 2 7x 5 1 2 4x 5 6 7x 6x 2x 3 1 )-( 7x 2 5 4x 3 7x 5 3 4x 1 2 0 2 7x 1 )+ 5 4x 2 )= 9 3 3x 1 5 2 7x 15 4x 4