5 3 4 x 6 1 4 July 8, 2019 16 32 64 128 3 4 ( x 1 2 )- 5 6 =- 1 4 5 6 1 4 * x 1 3 1 4 1 8 4 x 1 6 3 5 x 4 12 4 5 (- x 6 5 )+ 2x =- 2 1 4 (- 4x 3 4 5 x 5 6 )- 2 3 x 1 4 )= 10 9 7 1 5 x 6 1 4 x 4 1 3 4 + 4 = 6