persamaan nilai mutlak: 1). l2-8xl=22 2). lx-2l=l2x-1l mohon bantuannya

Materi : Persamaan Mutlak

Pembahasan :
|2 - 8x| = 22
|2| |1 - 4x| = 22
|1 - 4x| = 11

1 - 4x = 11
4x = 1 - 11
4x = -10
x = -5/2

1 - 4x = -11
4x = 1 + 11
4x = 12
x = 3

Hp : {-5/2 , 3}

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|x - 2| = |2x - 1|

x - 2 = 2x - 1
2x - x = -2 + 1
x = -1

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

Hp : {-1 , 1}