- | x + 1 | = | 3 - x |

Mapel : Matematika
Kelas : X SMA
Materi : Mutlak

Pembahasan :
-|x + 1| = |3 - x|
(-x - 1)² = (3 - x)²
(-x - 1)² - (3 - x)² = 0
(-2x + 2)(-4) = 0
8x - 8 = 0
8x = 8
x = 1

Hp : {1}