47. Реши уравнения: A) 18 = 3y + 3, 6x + 10 = 5x + 15, -5n - 16 = 3n, 8 - 5n = 10 - 4n, 9m - 8 = 6m + 7, 56 - 9n = -5n, 15 - 8x = 2 - 9x, -6m + 32 = 2m, 10z + 7 = 9z + 5, 10 - 9y = 70 - 6y, 60 - 11n = 20 - 10n, 7z + 40 = 3z, 4y + 7 = 5y + 4, -9x - 56 = 5x, 35 - 11m = 3m + 21, -12z + 95 = -7z, 7n + 12 = 6n + 8, 25 = 5y - 5, 28 - 9m = -8 - 10m, 15x - 12 = 8 - 5x, -10y - 64 = -6y, 16m - 5 = 15m - 10, 40 - 12x = 20 - 11x, 63 - 8n = n, 25 - 9y = 5y + 11

Решение уравнений (раздел A):

1. 18 = 3y + 3
   18 - 3 = 3y
   15 = 3y
   y = 15 / 3
   y = 5
2. 6x + 10 = 5x + 15
   6x - 5x = 15 - 10
   x = 5
3. -5n - 16 = 3n
   -16 = 3n + 5n
   -16 = 8n
   n = -16 / 8
   n = -2
4. 8 - 5n = 10 - 4n
   -5n + 4n = 10 - 8
   -n = 2
   n = -2
5. 9m - 8 = 6m + 7
   9m - 6m = 7 + 8
   3m = 15
   m = 15 / 3
   m = 5
6. 56 - 9n = -5n
   56 = -5n + 9n
   56 = 4n
   n = 56 / 4
   n = 14
7. 15 - 8x = 2 - 9x
   -8x + 9x = 2 - 15
   x = -13
8. -6m + 32 = 2m
   32 = 2m + 6m
   32 = 8m
   m = 32 / 8
   m = 4
9. 10z + 7 = 9z + 5
   10z - 9z = 5 - 7
   z = -2
10. 10 - 9y = 70 - 6y
    -9y + 6y = 70 - 10
    -3y = 60
    y = 60 / -3
    y = -20
11. 60 - 11n = 20 - 10n
    -11n + 10n = 20 - 60
    -n = -40
    n = 40
12. 7z + 40 = 3z
    7z - 3z = -40
    4z = -40
    z = -40 / 4
    z = -10
13. 4y + 7 = 5y + 4
    4y - 5y = 4 - 7
    -y = -3
    y = 3
14. -9x - 56 = 5x
    -56 = 5x + 9x
    -56 = 14x
    x = -56 / 14
    x = -4
15. 35 - 11m = 3m + 21
    35 - 21 = 3m + 11m
    14 = 14m
    m = 14 / 14
    m = 1
16. -12z + 95 = -7z
    95 = -7z + 12z
    95 = 5z
    z = 95 / 5
    z = 19
17. 7n + 12 = 6n + 8
    7n - 6n = 8 - 12
    n = -4
18. 25 = 5y - 5
    25 + 5 = 5y
    30 = 5y
    y = 30 / 5
    y = 6
19. 28 - 9m = -8 - 10m
    -9m + 10m = -8 - 28
    m = -36
20. 15x - 12 = 8 - 5x
    15x + 5x = 8 + 12
    20x = 20
    x = 20 / 20
    x = 1
21. -10y - 64 = -6y
    -64 = -6y + 10y
    -64 = 4y
    y = -64 / 4
    y = -16
22. 16m - 5 = 15m - 10
    16m - 15m = -10 + 5
    m = -5
23. 40 - 12x = 20 - 11x
    -12x + 11x = 20 - 40
    -x = -20
    x = 20
24. 63 - 8n = n
    63 = n + 8n
    63 = 9n
    n = 63 / 9
    n = 7
25. 25 - 9y = 5y + 11
    25 - 11 = 5y + 9y
    14 = 14y
    y = 14 / 14
    y = 1