|x| = a a>=0 x>=0 x=a
x<0 x=-a
А)|x -4| = 10
x-4 = 10 x=14
x-4 = -10 x=-6
Б) |-x -7| = 13
-x-7 = 13 x=-20
-x-7 = -13 x= 6
В) |-x +2| = 9
-x + 2 = 9 x=-7
-x+2 = -9 x=11
|x| = a a>=0 x>=0 x=a
x<0 x=-a
А)|x -4| = 10
x-4 = 10 x=14
x-4 = -10 x=-6
Б) |-x -7| = 13
-x-7 = 13 x=-20
-x-7 = -13 x= 6
В) |-x +2| = 9
-x + 2 = 9 x=-7
-x+2 = -9 x=11
х1=14 х2=-14
Б)|-х|=20
х1=20 х2=-20
В)|х|=7
х1=7 х2=-7