| 3x + 4 | = | x - 8 |

Kelas 10 Matematika
Bab Nilai Mutlak

|3x + 4| = |x - 8|
(3x + 4)² = (x - 8)²
(3x + 4)² - (x - 8)² = 0
(3x + 4 + x - 8) (3x + 4 - x + 8) = 0
(4x - 4) (2x + 12) = 0
4x - 4 = 0
4x = 4
x = 4/4
x = 1

2x + 12 = 0
2x = -12
x = -12/2
x = -6

{ -6, 1 }

3x + 4-4 = x-8-4
3x =x-16
3x-x= x-x-16
2x/2= -16/2
= x: -8