bagaimana penyelesaian (5-x)=7

5-x = 7
-x = 7-5
-x = 2
X = -2

Materi : Persamaan Mutlak

Pembahasan :
|5 - x| = 7
(5 - x)² = 7²
(5 - x)² - 7² = 0
(5 - x + 7)(5 - x - 7) = 0
(12 - x)(-2 - x) = 0
x = 12
x = -2

Hp : {-2 , 12}