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4x-2y=6 ~> dikali 1 ~> 4x-2y=6
-4y = 8, y=8:(-4) = -2
4x-2y = 6 ~> 4x- (2.-2) = 6
4x-(-4) = 6
4x + 4 = 6, 4x = 6-4 = 2, x= 2:4 = 0.5