( 2x + 1 ) - ( x - 1 ) = 3 please tolong bantu jawab dan pakai cara besok di kumpulin !! pel ( persamaan nilai mutlak satu variabel )

2x + 1 - x + 1 = 3
x = 1
semoga membantu, eh enggak tau deng bener apa nggak:")

Persamaan mutlak

|2x +1} - | x- 1| = 3

a)
(2x + 1) - (x -1)= 3
2x + 1 - x + 1 = 3
x + 2 = 3
x = 1

b)
(-2x - 1) - ( 1 - x) = 3
-2x -1 -1 + x = 3
-x - 2 = 3
- x = 5
x = - 5

HP = (-5, 1)