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5*5 pangkat x + (5/5 pangkat x) = 11
5y + 5/y =11 ---> dikali y
5y^2 + 5 = 11y
5y^2 - 11y + 5 = 0
(5y-1)(y-2)=0
y = 1/5 dan y =2
y=1/5
5 pangkat x = 1/5
x= -1
y=2
5 pangkat x = 2