Solve the following equations: 380 + x = 510 x : 16 = 80 24 * x = 480 (115 + 85) * 9 = (500 + 45) : 5 = (640 + 60) : 7 = 700 - x = 427 560 : x = 70 x - 1 = 13 (184 + 116) : 3 = (670 + 30) * 6 = (720 + 80) : 8 =

Решение:

1. \( 380 + x = 510 \)
   \( x = 510 - 380 \)
   \( x = 130 \)
2. \( x : 16 = 80 \)
   \( x = 80 \cdot 16 \)
   \( x = 1280 \)
3. \( 24 \cdot x = 480 \)
   \( x = 480 : 24 \)
   \( x = 20 \)
4. \( (115 + 85) \cdot 9 = \)
   \( 200 \cdot 9 = 1800 \)
5. \( (500 + 45) : 5 = \)
   \( 545 : 5 = 109 \)
6. \( (640 + 60) : 7 = \)
   \( 700 : 7 = 100 \)
7. \( 700 - x = 427 \)
   \( x = 700 - 427 \)
   \( x = 273 \)
8. \( 560 : x = 70 \)
   \( x = 560 : 70 \)
   \( x = 8 \)
9. \( x - 1 = 13 \)
   \( x = 13 + 1 \)
   \( x = 14 \)
10. \( (184 + 116) : 3 = \)
    \( 300 : 3 = 100 \)
11. \( (670 + 30) \cdot 6 = \)
    \( 700 \cdot 6 = 4200 \)
12. \( (720 + 80) : 8 = \)
    \( 800 : 8 = 100 \)

Ответ: 130; 1280; 20; 1800; 109; 100; 273; 8; 14; 100; 4200; 100.