5 9 x )= 7 2x 1 July 8, 2019 16 32 64 128 5 2x 7 )- 1 4 x 5 )+ 9 (- x 7 )+ 5 3 1 2x 9 5 x 7 = 35 9 x 5/7 5 x - 9 7= -12 8