Question 294638
(1 / n) + [1 / (n + 2)] = 12 / 35


35n + 70 + 35n = 12n^2 + 24n


0 = 12n^2 - 46n - 70


0 = 6n^2 - 23n - 35


0 = (6n + 7) (n - 5)


n = 5 ___ n + 2 = 7