1) Решите уравнение: 1) 53 + y = 97; 2) x + 147 = 231; 3) 856 – c = 412; 4) k – 4 523 = 2 354.

Решение:

1. 1) 53 + y = 97
   y = 97 – 53
   y = 44
2. 2) x + 147 = 231
   x = 231 – 147
   x = 84
3. 3) 856 – c = 412
   c = 856 – 412
   c = 444
4. 4) k – 4 523 = 2 354
   k = 2 354 + 4 523
   k = 6 877

Ответ: y = 44, x = 84, c = 444, k = 6 877.