tolong bantu jawab ya, beserta caranya yang nomer 1,3,4,5

ini yg no 1...





no 3...
A) | 9-4x | = 5
9-4x = 5
-4x = 5-9
-4x = -4
x = 1

-9+4x = 5
4x = 5 + 9
4x = 13
x = 13/4

hp : {1 , 13/4 }


B) | 3x -1 | = 4
3x -1 = 4
3x = 4 + 1
3x = 5
x = 5/3

-3x+1 = 4
-3x = 4 -1
-3x = 3
x = -1


hp : { -1 , 5/3}...




semoga membantu..
maaf kalo salah