3 7 10 x 2 3 5 July 8, 2019 16 32 64 128 3 4x 3 )-( x 7 )= 5 10 x )+ 2 20 3 7 x 3 5 x 2 10 6 7 3 4 x 3 5 2 10 2 3/7 - 10 х 1/2 5 x 7 = 35 3 7 x 10
