Question

I x-2/5 I =1/3 AI LAM DC HAY KET BAN NHE 

Answer 1

( x - 2/5) = 1/3

        x   = 1/3 +2/5

         x    = 11/15

Answer 2

\(\left|x-\frac{2}{5}\right|=\frac{1}{3}\)

\(\Leftrightarrow x-\frac{2}{5}=\frac{1}{3}\Rightarrow x=\frac{1}{3}+\frac{2}{5}=\frac{11}{15}\)

hoặc \(x-\frac{2}{5}=-\frac{1}{3}\Rightarrow x=-\frac{1}{3}+\frac{2}{5}=\frac{1}{15}\)

Vậy \(x\in\left\{\frac{1}{15};\frac{11}{15}\right\}\)

Answer 3

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