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x/1 + 2/x = 3/1 (samakan penyebut dgn x). sehingga:
x² + 2 = 3x
x² - 3x + 2 = 0
x² - x - 2x + 2 = 0
(x² - x) - (2x - 2) = 0
x(x - 1) - 2(x - 10 = 0
x - 2 = 0 dan x - 1 = 0
x = 2 dan x = 1.