(5x + 1) / 6 - [(3x - 1) / 4 - (3x + 1) / 3], 그 중 x = - 9

(5x + 1) / 6 - [(3x - 1) / 4 - (3x + 1) / 3], 그 중 x = - 9

(5x + 1) / 6 - [(3x - 1) / 4 - (3x + 1) / 3]
= 2 (5x + 1) / 12 - [3 (3x - 1) / 12 - 4 (3x + 1) / 12]
= (10 x + 2) / 12 - (9x - 3) / 12 + (12x - 4) / 12
= (13x + 1) / 12
= [13 * (- 9) + 1] / 12
= (- 116) / 12
= 29 / 3