2. Решите уравнения: 40 + (2x − 5) = 53; 145 − (x + 45) = 50; (39 + x) − 27 = 22; 14 · (x − 10) = 84; 40 − 3 · (x + 2) = 10.

1. 40 + (2x − 5) = 53
   2x + 35 = 53
   2x = 18
   x = 9.

2. 145 − (x + 45) = 50
   100 − x = 50
   −x = −50
   x = 50.

3. (39 + x) − 27 = 22
   x + 12 = 22
   x = 10.

4. 14 · (x − 10) = 84
   x − 10 = 6
   x = 16.

5. 40 − 3 · (x + 2) = 10
   3 · (x + 2) = 30
   x + 2 = 10
   x = 8.

Ответ: 1) x = 9; 2) x = 50; 3) x = 10; 4) x = 16; 5) x = 8.