Tentukan himpunan penyelesaian dari |x-2|=10 dan |2x-9|=21

Materi : Nilai Mutlak
Kelas : X SMA

Ix - 2I = 10
x - 2 = 10 atau -10

x - 2 = 10
x = 10 + 2
x = 12

x - 2 = -10
x = -10 + 2
x = -8

Hp = { -8 , 12 }

I2x - 9I = 21
2x - 9 = 21 atau -21

2x - 9 = 21
2x = 21 + 9
2x = 30
x = 15

2x - 9 = -21
2x = -21 + 9
2x = -12
x = -6

Hp = { -6 , 15 }