4 x 7 9 3 x 1 4 July 8, 2019 16 32 64 128 2 1 4 x 7 9 x 3 4 4 7 x 6 1 4 7 x 3 9 3 4 x+ 9 4 1 7 x 5 4 x 7 9 3 x is equal to 1 by 4 4/7 x 9 4/7 x 3 1/9 4 x 9 x 7 4 - x 7 = x 9
