Tentukan nilai mutlak dari 1. |x+1|=7-2x 2. |3x-6|=|2x+1|

Bab Nilai Mutlak
Matematika SMA Kelas X

1] |x + 1| = 7 - 2x

x + 1 = 7 - 2x
x + 2x = 7 - 1
3x = 6
x = 6/3
x = 2

HP = { 2 }

2] |3x - 6| = |2x + 1|

3x - 6 = 2x + 1
3x - 2x = 1 + 6
x = 7

3x - 6 = -2x - 1
3x + 2x = -1 + 6
5x = 5
x = 1

HP = {1, 7}