7x 3 9x 7 July 8, 2019 16 32 64 128 7x 3 )-( 9x 7 )= 5 7x 1 3 7 9x 6 2 9x 3 )-( 7x 7 )=- 84 X4 7x 3 9x 2 7x 10 3 7x 8 9x 7 8
