7 х 4 2 х 9 July 8, 2019 16 32 64 128 7 x 4 2 x 9 X 7 )+ 4 3 2 x 9 7 9x 4 2 x 9 7x 1 X 4 )( x 2 9x 7 4 7 х 21 2 3 х 9 7 4 x 2 9 as a fraction 2 7(х-4 7)=9 45 9 - 2(-4х+7) = 7
