B. |x-4|=3x+2 C. 5x-3=4x+21 Persamaan nilai mutlak? Dibantu yaa kak??

B. |x-4|=3x+2
x-4=3x+2
x-3x=2+4
-2x=6
x = -3

|x-4|= -(3x+2)
x-4 = -(3x+2)
x+3x = (-2+4)
4x = 2
x = 2/4 = 1/2

Hp : {-3 ; 1/2}

C. 5x-3=4x+21
5x-4x = 21+3
x = 24

Semoga membantu yaa:)