Ответ:

Пошаговое объяснение:

1) 5(x - 3) = -2(x - 4) + 6

5x - 15 = -2x + 8 + 6

5x - 15 = -2x + 14

5x + 2x = 14+15

7x = 29

x = 29:7

x = 4цел. 1/7

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2) 1 + 7(x - 2) = 5(3 - 2x) + 3

1 + 7x - 14 = 15 - 10x + 3

7x - 13 = 18 - 10x

7x + 10x = 18+13

17x = 31

x = 31 : 17

x = 1цел. 14/17

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3) 9 - 6(7 - 5x) = 8 + 2(x + 4)

9 - 42 + 30x = 8 + 2x + 8

30x - 33 = 16 + 2x

30x - 2x = 16 + 33

28x = 49

x = 49 : 28

x = 1цел. 21/28

x = 1цел. 3/4

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4) (9/10)x = -5

x = -5 : 9/10

x = -5 * 10/9

x = -50/9

x = -5цел. 5/9

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5) -(3/7)x = -27/49

x = -27/49 : (-3/7)

x = -27/49 * (-7/3)

x = 9/7

x = 1цел. 2/7

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6) 9x - 6(-2 + x) = -7 * 5x + 20

9x + 12 - 6x = -35x + 20

3x + 12 = -35x + 20

3x + 35x = 20 - 12

38x = 8

x = 8 : 38

x = 8/38

x = 4/19

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7) -3(6x + 2) - 1 = 4(x - 3) - 9

-18x - 6 - 1 = 4x - 12 - 9

-18x - 7 = 4x - 21

4x + 18x = 21 - 7

22x = 14

x = 14/22

x = 7/11

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8) -(2/3x) = -5/30

3x * (-5) = (-2) * 30

-15x = -60

x = -60 : (-15)

x = 4

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9) -5(-5 + 3x) - 1 = 9x + 5*6

25 - 15x - 1 = 9x + 30

24 - 15x = 9x + 30

9x + 15x = 24 - 30

24x = -6

x = -6/24

x = -1/4

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10) 10 * (2/5)x = (7*(-1-1))/(-2*(-15))

4x = 14/30

x = 14/30 : 4

x = 13/30 * 1/4

x = 13/120

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