1 2 6x 7 (- 3x 1 7 July 8, 2019 16 32 64 128 7 3x 1 )+ 2 x 7 )= 3 6x 1 1 - 3(1 2 - 2x) = 7 6x - 6 6 7. 1 3 (6x 1. 7. 1 3 (6x- 1. (7 6 + 2x) - (3x - 6 4) 0