3 7x 7 9x July 8, 2019 16 32 64 128 7x 3 )-( 9x 7 )= 5 3 7x 8 9x 7 8 9x 3 )-( 7x 7 )=- 84 3 x 3 = 9 3 7x=9 3 7 x