if x+1/x=12,find the value of x-1/x
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x+1=12x
11x=1
x=1/11
therefore
x-1/x=1/11-1÷1/11
= -10/11 ÷ 1/11
= - 10
11x=1
x=1/11
therefore
x-1/x=1/11-1÷1/11
= -10/11 ÷ 1/11
= - 10
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