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x = 1 - 4x
-6x -2y = -3
-6x - 2(1-4x) = -3
-6x -2 + 8x = -3
2x - 2 = -3
2x = -1
x = -1/2
4x + y = 1
4(-1/2) + y = 1
-2 + y =1
y = 3
jadi x = -1/2 dan y = 3