x-1/x=5, find x3-1/x3
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Step-by-step explanation:
x-1/x=5
5x=x-1
x=1/4
so 3x-1/3x=
3(1/4)-1/3(1/4)
3/4-4/4/3/4
-1/4/3/4
-1/3
3x-1/3x is -1/3
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