7 x - 9 = 40 July 8, 2019 16 32 64 128 7 x 9 40 7 19 x 5 )-( 40 9 )= 70 7 x 9 )+ 21 x 3 )= 406 72 x 7 x 40 9 7 x 2 40.7 x 9 7 x 8 40 x 9 5 x 7 = 35 9/7 x 4 7 - 9 7 9 x
