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Pembahasan :
Cara 1, Kuadratkan kedua ruas
|x + 1| = |2x - 3|
(x + 1)² = (2x - 3)²
(2x - 3)² - (x + 1)² = 0
(2x - 3 + x + 1)(2x - 3 - x - 1) = 0
(3x - 2)(x - 4) = 0
x = 2/3 atau x = 4
Hp : {2/3 , 4}
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Cara 2, Definisi Mutlak
|x + 1| = |2x - 3|
x + 1 = 2x - 3 atau x + 1 = 3 - 2x
2x - x = 1 + 3 atau x + 2x = 3 - 1
x = 4 atau 3x = 2
x = 4 atau x = 2/3
Hp : {2/3 , 4}