Вопрос:

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.

Ответ:

  1. x * 3 = 21

    x = 21 / 3

    x = 7

  2. 15 : x = 5

    x = 15 / 5

    x = 3

  3. 4 * x = 28

    x = 28 / 4

    x = 7

  4. x - 17 = 46

    x = 46 + 17

    x = 63

  5. 48 - x = 29

    x = 48 - 29

    x = 19

  6. x - 13 = 26

    x = 26 + 13

    x = 39

  7. x + 24 = 56

    x = 56 - 24

    x = 32

  8. 37 + x = 70

    x = 70 - 37

    x = 33

  9. x + 18 = 40

    x = 40 - 18

    x = 22

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