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y² - 6y = -8
y² - 6y + 8 = 0
(y - 4)(y - 2) = 0
y = 4 atau y = 2
masukkan y = 4 dan y = 2 ke 3x - 4 = y
y = 4
3x - 4 = y
3x - 4 = 4
3x = 4 + 4
3x = 8
x = 8/3
y = 2
3x - 4 = y
3x - 4 = 2
3x = 2 + 4
3x = 6
x = 6/3 = 2
jadi nilai x = 8/3 atau x = 2
maaf kalau salah
semoga membantu