Question

3) | 9 + x | = 0; 4) | 2x + 1 | + 13 = 14; 5) 7 | x | – 3 = 0; 6) | x – 4 | = –2

Answer 1

Ответ:

1) |9+х|=0

9+х=0

х= -9

2) |2х+1| +13=14

|2х+1|=14-13

|2х+1=1

1)2х+1=1

2)2х+1= -1

1)х=0

2)х= -1

3) 7 |х|-3

7х-3

7х-3=0

х=3/7

4)|х-4|= -2

пустое множество