Question

помогите сегодня пожалуйста!!!​

Answer 1

Ответ:

Пошаговое объяснение:

5x + 12 = 4x + 6

5x - 4x = 6 - 12

x = -6

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4x - 16 = 10x + 2

10x - 4x = -16 - 2

6x = -18

x = -18:6

x = -3

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3x - 20 = 5x - 25

5x - 3x = 25 - 20

2x = 5

x = 5 : 2

x = 2,5

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12x + 9 = 7x - 4

12x - 7x = -4 - 9

5x = -13

x = -13 : 5

x = -2,6

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8x - 27 = 6x - 17

8x - 6x = 27 - 17

2x = 10

x = 10 : 2

x = 5

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10,2x - 6 = 10x + 8

10,2x - 10x = 8 + 6

0,2x = 14

x = 14 : 0,2

x = 70

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24y - 28 = 15y + 35

24y - 15y = 35 + 28

9y = 63

y = 63 : 9

y = 7

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28 - 3x = 12x - 32

12x + 3x = 28 + 32

15x = 60

x = 60 : 15

x = 4

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1 - 4x = 14x - 35

14x + 4x = 35 + 1

18x = 36

x = 36 : 18

x = 2

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8y + 14 = 4y - 26

8y - 4y = -26 - 14

4y = -40

y = -40 : 4

y = -10

Answer 2

Ответ: 1. -6

2. -3

3. 2,5

4. -2,6

5. 5

6. 70

7. 7

8. 4

9. 2

10. -10

Пошаговое объяснение:

1. 5х + 12 = 4х + 6; 5х - 4х = 6 - 12; х = -6

2. 4х - 16 = 10х + 2; 4х - 10х = 2 + 16; -6х = 18; х = -3

3. 3х - 20 = 5х - 25; 3х - 5х = 20 - 25; -2х = -5; х = 2,5

4. 12х + 9 = 7х - 4; 12х - 7х = -9 - 4; 5х = -13; х = -13/5; х = -2,6

5. 8х - 27 = 6х - 17; 8х - 6х = 27 - 17; 2х = 10; х = 5

6. 10,2х - 6 = 10х + 8; 10,2х - 10х = 6 + 8; 0,2х = 14; х = 70

7. 24у - 28 = 15у + 35; 24у - 15у = 28 + 35; 9у = 63; у = 7

8. 28 - 3х = 12х - 32; -12х - 3х = -28 - 32; -15х = -60; х= 4

9. 1 - 4х = 14х - 35; -14х - 4х = -1 -35; -18х = -36; х = 2

10. 8у + 14 = 4у - 26; 8у - 4у = -14 - 26; 4у = -40; у = -10