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Verified answer
(1/y) + (2/x) = 4 ...(×1) ⇒ (1/y) + (2/x) = 4(3/y) - (1/x) = 5 ....(×2) ⇒ (6/y) - (2/x) = 10
----------------------- (+)
7/y = 14
7 = 14y
y = 7/14
y = ¹/₂
(1/y) + (2/x) = 4
(1/(¹/₂)) + (2/x) = 4
2 + (2/x) = 4
2/x = 4 - 2
2/x = 2
2 = 2x
x = 1
Jawaban D. x = 1 ; y = ¹/₂