Question

помогите пожалуйста ​

Answer 1

Решение:

1

2x + 17 = 22 + 3x

3x - 2x = 17 - 22

x = -5

2

18 + 3x = x + 14

3x - x = 14 - 18

2x = -4

x = -2

3

25 - 4x = 12 - 5x

-4x + 5x = 12 - 25

x = -13

4

3.4x - 4 = 4.8 - x

34x - 40 = 48 - 10x

34x - 10x = 48 + 40

44x = 88

x = 2

5

2x + 7 = x + 5.5

2x - x = 5.5 - 7

x = 1.5

6

5 - 3x = 2x - 8

2x + 3x = 5 + 8

5x = 13

$x = \frac{13}{5} = 2.6$

7

13x + 27 = 16x + 4.5

16x + 13x = 27 - 4.5

29x = 22.5

$x = \frac{22.5}{29}$

8

21x + 45 = 17 + 14x

21x - 14x = 17 - 45

7x = -28

x = -4

9

13x + 70 = 2x + 15

13x - 2x = 15 - 70

11x = -55

x = -5

10

9.5x + 2 = 5.7x - 5.6

95x + 20 = 57x + 56

95x - 57x = 56 - 20

38x = 36

$x = \frac{36}{38}$

11

1.5x + 8 = 3.1x + 16

3.1x - 1.5x = 8 - 16

1.6x = 8

x = 5

12

2.9x + 7.4 = x + 1.7

29x + 74 = 10x + 17

29x - 10x = 17 - 74

19x = -57

x = -3