please ..............

21 . E

|X-2|=2X-1
= X-2X= 2-1
= -X = 1

jawab

20
| - 8 + 3a |/2 = 5
| - 8 + 3a | = 10

(i) - 8 + 3a  = 10
3a = 10 + 8 = 18
a = 6

(ii) - 8 + 3a = - 10
3a = -10 + 8 = - 2
a = - 2/3

HP ( -2/3 , 6)


21.
|x -2 | = 2x -1

(i)  x - 2 = 2x - 1
x - 2x = -1 + 2
-x = 1
x = - 1 (tidak memenuhi)

(ii)  2 - x = 2x - 1
-x - 2x = - 1 - 2
- 3x = - 3
x = 1

HP  (1)