4x - 1 = 3x + 2
x = 3
4x - 1 = - 3x - 2
7x = - 1
x = - 1/7 (C)
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4x - 1 = 3x + 2
x = 3
4x - 1 = - 3x - 2
7x = - 1
x = - 1/7 (C)
(4x - 1)² = (3x + 2)²
(4x - 1)² - (3x + 2)² = 0
(4x - 1 + 3x + 2)(4x - 1 - 3x - 2) = 0
(7x + 1)(x - 3) = 0
7x + 1 = 0
7x = -1
x = -1/7
x - 3 = 0
x = 3
maka, nilai x yang memenuhi adalah -1/7 atau 3
Jawaban C