2. Найдите x, решив уравнения.

Решения: (a) 65 + x = 21 -> x = 21 - 65 -> x = -44. (b) x - 58 = 24 -> x = 24 + 58 -> x = 82. (c) (x - 24) / 2 = 191 -> x - 24 = 191 * 2 -> x = 382 + 24 -> x = 406. (d) 3870 / x = 8346 -> x = 3870 / 8346.