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1/4 pangkat x-1= 2 pangkat 2x+2/3
(2 pangkat -2)pangkat x-1= 2 pngkt 2x+2/3
2 pngkt -2x+1= 2 pngkt 2x+2/3
-2x+1=2x+2/3
-2x-2x= 2/3-1
-4x= -1
x= 1/4