Question

3 . I x - 1 I +2 . I x - 1 I = 3 . I x -1 I + 4 

giải hộ mình cái

Answer 1

3.|x-1|+2.|x-1|=3.|x-1|+4

​suy ra: 2.|x-1|=4

​|x-1|=4:2

​|x-1|=2

​|x-1|=2 tuc la x-1=2 hoac x la nguyen am cach so khong 2 don vi

Vay x = {3;-2}