9 1 x ) - 7x 5 July 8, 2019 16 32 64 128 9 7 x 5x 1 7x 4 x 5 )-( 7x 9 )= 1 X 1 7x 9 5x 17 X 5 7x 9 1 15 X 1 2x 9 7x 5
