Question

пж решите дам 20 баллов​

Answer 1

Ответ:

Пошаговое объяснение:

-8x + 4(7 + 8x) = 4x + 7

-8x + 28 + 32x = 4x + 7

24x + 28 = 4x + 7

24x - 4x = 7 - 28

20x = -21

x = -21 : 20

x = -1,05

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-x + 2(7 - 9x) = x - 4

-x + 14 - 18x = x - 4

-19x + 14 = x - 4

19x + x = 14 + 4

20x = 18

x = 18 : 20

x = 0,9

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

-7x + 18 + 9x = -4x + 3

2x + 18 = -4x + 3

2x + 4x = 3 - 18

6x = -15

x = -15 : 6

x = -2,5

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-x + 4(7 - x) = -7x + 5

-x + 28 - 4x = -7x + 5

-5x + 28 = -7x + 5

7x - 5x = 5 - 28

2x = -23

x = -23 : 2

x = -11,5

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-9x - 9(4 - x) = 3x + 3

-9x - 36 + 9x = 3x + 3

-36 = 3x + 3

3x = -36 - 3

3x = -39

x = -39 : 3

x = -13

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x - x/9 = 8/3    |*9

9x - x = 24

8x = 24

x = 24 : 8

x = 3

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