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Bui Duy Vuong

07/07/2017 at 20:48
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Find the x satisty: \(\left|x-1\right|=2x-4\)




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    Phan Thanh Tinh Coordinator 08/07/2017 at 07:19

    Condition : \(\left|x-1\right|\ge0\Rightarrow2x-4\ge0\Rightarrow x\ge2\)

    We have : \(x\ge2\Rightarrow x-1\ge1>0\Rightarrow\left|x-1\right|=x-1\)

    \(\Rightarrow x-1=2x-4\Rightarrow2x-x=-1+4\Rightarrow x=3\) (satisfied)

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