Question

Решить уравнение:
1) |xl=7 ;
2) | x +2| = 3;
3) | x-3|=0;
4) | x+4 | = -3 ;
5) | x| + + 3 = 9
6) | x|-1 =-5;
7) 2| x|-5 = 0;
8) 5|x| +1 = 0;
9) | 5x+3| - 3 = 0 ;
10) | 3x-2| +5 = 7 .

Answer 1

Ответ:

1. x=7
2. x+2=3

x=3-2

x=1

3.x+3=0

x=0-3

x=-3

4.x+4=-3

x=-3-4=-7

5.x+3=9

x=9-3=3

6.x-1=-5

x=-5+1=-4

7.2x-5=0

2x=0-5

2x=-5

x=-2.5

8.5x+1=0

5x=0-1=-1

x=-1/5

9.5x+3-3=0