5 1 3 x 9 1 2 July 8, 2019 16 32 64 128 5 1 3 x 9 1 2 as a fraction 1 3 4 x 1 9 2 5 1 x 3 1 x 9 1 x 5 1 x 21 1 1 3 5 2 9 x 4.7 5 1 3 x 9 20 5 2 1 3 x 9 2 6 7 5 3 4 x 9 1 2 envelope 1 9 − 5 ( 3 x + 1 ) = 2 9 5 + 9 = 14 5 = - 1 - 3 - 9 x
