3. Решите уравнение: 1) (x + 69) − 45 = 27; 2) (x − 71) + 22 = 34; 3) 85 − (x + 14) = 36; 4) 99 − (x + 28) = 12.

1. \((x + 69) - 45 = 27\)
   \(x + 24 = 27\)
   \(x = 3\)
2. \((x - 71) + 22 = 34\)
   \(x - 49 = 34\)
   \(x = 83\)
3. \(85 - (x + 14) = 36\)
   \(71 - x = 36\)
   \(x = 35\)
4. \(99 - (x + 28) = 12\)
   \(71 - x = 12\)
   \(x = 59\)

Ответ: 1) 3; 2) 83; 3) 35; 4) 59.