Question

|3x+12|=18
|6х-33|=15
|9х-42|=21
решите пожалуйста​

Answer 1

$|3x + 12| = 18 \\ 3x + 12 = 18 \qquad3x + 12 = - 18 \\ 3x = 6 \qquad3x = - 30 \\ x_{1} = 2 \qquad x_{2} = - 10$

$|6x - 33| = 15 \\ 6x - 33 = 15 \qquad6x - 33 = - 15 \\ 6x = 48 \qquad6x = 18 \\ x_{1} = 8 \qquad x_{2} = 3$

$|9x - 42| = 21 \\ 9x - 42 = 21 \qquad 9x - 42 = - 21 \\ 9x = 63 \qquad 9x = 21 \\ x_{1} = 7 \qquad x_{2} = \frac{7}{3}$

Answer 2

Ответ:

|3x+12|=18

3х+12=18

3х=18-12

3х=6

х=6:3

х1=2

3х+12=-18

3х=-18-12

3х=-30

х2=-10

|6х-33|=15

6х-33=15

6х=15+33

6х=48

х=48:6

х1=8

6х-33=-15

6х=-15+33

6х=18

х2=3

|9х-42|=21

9х-42=21

9х=21+42

9х=63

х1=7

9х-42=-21

9х=-21+42

9х=21

х2=21/9

х2=21:3\9:3

х2=7\3

х2=2 1\3