5. Решите уравнения: х-43-731 x:16-19 2369:(x+76)-23 (38-y)-18-31

Решим уравнения:

1. x - 43 = 731
   x = 731 + 43
   x = 774
2. x ∶ 16 = 19
   x = 19 × 16
   x = 304
3. 2369 ∶ (x + 76) = 23
   x + 76 = 2369 ∶ 23
   x + 76 = 103
   x = 103 - 76
   x = 27
4. (38 - y) - 18 = 31
   38 - y = 31 + 18
   38 - y = 49
   y = 38 - 49
   y = -11

Ответ:

• x = 774
• x = 304
• x = 27
• y = -11