Реши уравнения: x · 3 = 21; 15 : x = 5; 4 · x = 28; x − 17 = 46; 48 − x = 29; x − 13 = 26; x + 24 = 56; 37 + x = 70; x + 18 = 40.

1. \(x \cdot 3 = 21\)
   \(x = 21 : 3 = 7\).
2. \(15 : x = 5\)
   \(x = 15 : 5 = 3\).
3. \(4 \cdot x = 28\)
   \(x = 28 : 4 = 7\).
4. \(x - 17 = 46\)
   \(x = 46 + 17 = 63\).
5. \(48 - x = 29\)
   \(x = 48 - 29 = 19\).
6. \(x - 13 = 26\)
   \(x = 26 + 13 = 39\).
7. \(x + 24 = 56\)
   \(x = 56 - 24 = 32\).
8. \(37 + x = 70\)
   \(x = 70 - 37 = 33\).
9. \(x + 18 = 40\)
   \(x = 40 - 18 = 22\).

Ответ: 7; 3; 7; 63; 19; 39; 32; 33; 22.