|2х+14|=6 |8х+12|=20 |9х+15|=6 Буду благодарна!

Question

|2х+14|=6
|8х+12|=20
|9х+15|=6
Буду благодарна!

Answer 1

|2х + 14| = 6

2x + 14 = 6
 
2x =  -14 + 6
 
 2x =  - 8

х = -8 : 2 

х = - 4



2x + 14 = -6

2x =  - 6 -14

2х = -20

x= - 20 : 2

 х = -10

.............................................................................................................

|8х + 12| = 20

8x + 12  = 20

8x =  20 - 12

8х = 8

х =8 : 8 

х = 1


8x + 12 = -20

8x = - 20 -12

8х = - 32

х = -32 : 8

х= - 4

..................................................................................................................
|9х + 15| = 6

9x+15 = 6

9x = 6 - 15

9х = -9

х = - 9 : 9 

х = -1


9x + 15 = -6

9x =  - 6  -15

 9х = - 21

х = -21 : 9

х = - 2 целых 3/9 = - 2 целых 1/3

Answer 2

|2х+14|=6
1)2x+14=6  ⇒  2x=-8  ⇒  x=-4
2)2x+14=-6  ⇒ 2x=-20  ⇒  x=-10

|8х+12|=20
1) 8x+12=20   ⇒ 8x=8   ⇒   x=1
2) 8x+12=-20  ⇒ 8x=-32  ⇒  x=-4

|9х+15|=6
1) 9x+15=6   ⇒  9x=-9   ⇒  x=-1
2) 9x+15=-6  ⇒  9x=-21  ⇒ x=-21/9=-7/3