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2/x + 6/y = 1 ...(2)
(1) × xy, 2y - 2x = -3xy ...(1)'
(2) × xy, 2y + 6x = xy ...(2)'
(2)' - (1)' 8x = 4xy
8 = 4y
y =2
substitusikan y = 2 ke persamaan (1)'
4 - 2x = -6x
4 = -6x + 2x
4 = -4x
x = -1
Jadi, x= -1 dan y =2
nilai 2x + y = 2(-1) + 2 = 0
opsi yang tepat adalah A.0
semoga membantu