23.5x + 4 = x + 12 24.13-5y = 8 - 2y 25.5x + (3x - 7) = 9 26.3y-(5-y) = 11 27.(7a+1)-(6a + 3) = 5 28. (8s + 11) - 13 = 9s- 5 29. (5x-3)+(7x-4) = 8 - (15 – 11x) 30.(7-5k)-(8 - 4k) + (5k + 6) = 8 31.2x + 5 = 2(x + 1) + 11 32.15(ν + 2) – 30 = 15v 33.5(3x + 1,2) + x = 6,8 34.0,4b + 3 = 0,2(3b + 1) – b 35.6(x - 1) = 9,4 – 1,7x 36.3,5 - 9a = 2(0,5a – 4) 37.3(2,4 – 1,1m) = 2,7m + 3,2 38.3(x - 1) = 2(2-x) + 6 39.4(3-h) - 11 = 7(2h-5) 40.-3(3y + 4) + 4(2y - 1) = 0 41.0,3(5x - 7) = 3(0,2x + 3,2) 42.4(1,2b + 3,7) – 2,8 = 5,2b 43.0,9(4y - 2) = 0,5(3y - 4) + 4,4 44.4(0,2x - 7) – 5(0,3x + 6) = 5

Решение линейных уравнений:

1. №23:

   5x + 4 = x + 12

   5x - x = 12 - 4

   4x = 8

   x = 8 / 4

   x = 2

2. №24:

   13 - 5y = 8 - 2y

   -5y + 2y = 8 - 13

   -3y = -5

   y = -5 / -3

   y = 5/3

3. №25:

   5x + (3x - 7) = 9

   5x + 3x - 7 = 9

   8x = 9 + 7

   8x = 16

   x = 16 / 8

   x = 2

4. №26:

   3y - (5 - y) = 11

   3y - 5 + y = 11

   4y = 11 + 5

   4y = 16

   y = 16 / 4

   y = 4

5. №27:

   (7a + 1) - (6a + 3) = 5

   7a + 1 - 6a - 3 = 5

   a - 2 = 5

   a = 5 + 2

   a = 7

6. №28:

   (8s + 11) - 13 = 9s - 5

   8s + 11 - 13 = 9s - 5

   8s - 2 = 9s - 5

   8s - 9s = -5 + 2

   -s = -3

   s = 3

7. №29:

   (5x - 3) + (7x - 4) = 8 - (15 - 11x)

   5x - 3 + 7x - 4 = 8 - 15 + 11x

   12x - 7 = -7 + 11x

   12x - 11x = -7 + 7

   x = 0

8. №30:

   (7 - 5k) - (8 - 4k) + (5k + 6) = 8

   7 - 5k - 8 + 4k + 5k + 6 = 8

   (-5k + 4k + 5k) + (7 - 8 + 6) = 8

   4k + 5 = 8

   4k = 8 - 5

   4k = 3

   k = 3/4

9. №31:

   2x + 5 = 2(x + 1) + 11

   2x + 5 = 2x + 2 + 11

   2x + 5 = 2x + 13

   5 = 13

   Нет решений.

10. №32:

    15(v + 2) - 30 = 15v

    15v + 30 - 30 = 15v

    15v = 15v

    0 = 0

    Бесконечное множество решений (любое v).

11. №33:

    5(3x + 1,2) + x = 6,8

    15x + 6 + x = 6,8

    16x = 6,8 - 6

    16x = 0,8

    x = 0,8 / 16

    x = 8 / 160

    x = 1 / 20

    x = 0,05

12. №34:

    0,4b + 3 = 0,2(3b + 1) - b

    0,4b + 3 = 0,6b + 0,2 - b

    0,4b + 3 = -0,4b + 0,2

    0,4b + 0,4b = 0,2 - 3

    0,8b = -2,8

    b = -2,8 / 0,8

    b = -28 / 8

    b = -7 / 2

    b = -3,5

13. №35:

    6(x - 1) = 9,4 - 1,7x

    6x - 6 = 9,4 - 1,7x

    6x + 1,7x = 9,4 + 6

    7,7x = 15,4

    x = 15,4 / 7,7

    x = 154 / 77

    x = 2

14. №36:

    3,5 - 9a = 2(0,5a - 4)

    3,5 - 9a = 1a - 8

    3,5 - 9a = a - 8

    -9a - a = -8 - 3,5

    -10a = -11,5

    a = -11,5 / -10

    a = 1,15

15. №37:

    3(2,4 - 1,1m) = 2,7m + 3,2

    7,2 - 3,3m = 2,7m + 3,2

    7,2 - 3,2 = 2,7m + 3,3m

    4 = 6m

    m = 4 / 6

    m = 2 / 3

16. №38:

    3(x - 1) = 2(2 - x) + 6

    3x - 3 = 4 - 2x + 6

    3x - 3 = 10 - 2x

    3x + 2x = 10 + 3

    5x = 13

    x = 13 / 5

    x = 2,6

17. №39:

    4(3 - h) - 11 = 7(2h - 5)

    12 - 4h - 11 = 14h - 35

    1 - 4h = 14h - 35

    1 + 35 = 14h + 4h

    36 = 18h

    h = 36 / 18

    h = 2

18. №40:

    -3(3y + 4) + 4(2y - 1) = 0

    -9y - 12 + 8y - 4 = 0

    -y - 16 = 0

    -y = 16

    y = -16

19. №41:

    0,3(5x - 7) = 3(0,2x + 3,2)

    1,5x - 2,1 = 0,6x + 9,6

    1,5x - 0,6x = 9,6 + 2,1

    0,9x = 11,7

    x = 11,7 / 0,9

    x = 117 / 9

    x = 13

20. №42:

    4(1,2b + 3,7) - 2,8 = 5,2b

    4,8b + 14,8 - 2,8 = 5,2b

    4,8b + 12 = 5,2b

    12 = 5,2b - 4,8b

    12 = 0,4b

    b = 12 / 0,4

    b = 120 / 4

    b = 30

21. №43:

    0,9(4y - 2) = 0,5(3y - 4) + 4,4

    3,6y - 1,8 = 1,5y - 2 + 4,4

    3,6y - 1,8 = 1,5y + 2,4

    3,6y - 1,5y = 2,4 + 1,8

    2,1y = 4,2

    y = 4,2 / 2,1

    y = 42 / 21

    y = 2

22. №44:

    4(0,2x - 7) - 5(0,3x + 6) = 5

    0,8x - 28 - 1,5x - 30 = 5

    -0,7x - 58 = 5

    -0,7x = 5 + 58

    -0,7x = 63

    x = 63 / -0,7

    x = -630 / 7

    x = -90

Ответ: Решения для каждого номера приведены выше.