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

1. x · 3 = 21

   x = 21 : 3 = 7.

2. 15 : x = 5

   x = 15 : 5 = 3.

3. 4 · x = 28

   x = 28 : 4 = 7.

4. x − 17 = 46

   x = 46 + 17 = 63.

5. x + 24 = 56

   x = 56 − 24 = 32.

6. 48 − x = 29

   x = 48 − 29 = 19.

7. x − 13 = 26

   x = 26 + 13 = 39.

8. 37 + x = 70

   x = 70 − 37 = 33.

9. x + 18 = 40

   x = 40 − 18 = 22.

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