1. 5x-14 = x + 12 2. -11 + 3y = 8-2y 3. 7x + (5x - 6) = -9 4. y-(-9 - y) = 7 5. (7x - 5) – (8-x)=2 6. 9x + 5 = 121 + (7-x) 7.-5(3y + 4) + 9(2y - 1) = 0 8.0,3(5x - 7) = 3(0,2x + 3,2)

Решаем уравнения:

1. 5x - 14 = x + 12

   5x - x = 12 + 14

   4x = 26

   x = 26 / 4

   x = 6.5

2. -11 + 3y = 8 - 2y

   3y + 2y = 8 + 11

   5y = 19

   y = 19 / 5

   y = 3.8

3. 7x + (5x - 6) = -9

   7x + 5x - 6 = -9

   12x = -9 + 6

   12x = -3

   x = -3 / 12

   x = -0.25

4. y - (-9 - y) = 7

   y + 9 + y = 7

   2y = 7 - 9

   2y = -2

   y = -1

5. (7x - 5) – (8 - x) = 2

   7x - 5 - 8 + x = 2

   8x = 2 + 5 + 8

   8x = 15

   x = 15 / 8

   x = 1.875

6. 9x + 5 = 121 + (7 - x)

   9x + 5 = 121 + 7 - x

   9x + x = 128 - 5

   10x = 123

   x = 123 / 10

   x = 12.3

7. -5(3y + 4) + 9(2y - 1) = 0

   -15y - 20 + 18y - 9 = 0

   3y = 29

   y = 29 / 3

   y = 9.(6)

8. 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 = 13

Ответ: Выше приведены решения уравнений.