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4x = 1 x = -2
x =1/4
nilai k+3/4 ------>> utk x = 1/4 maka: 1/4+3/4 = 4/4 = 1
utk x = -2 maka : -2+ 3/4 = -8/4+3/4
= -5/4
jadi,jwbny adlh B.