Tìm giá trị x biết rằng ​\({\left( {x - \frac{3}{5}} \right)^3} = \frac{1}{{27}}\)

* Hướng dẫn giải

 \(\begin{aligned} &{\left( {x - \frac{3}{5}} \right)^3} = \frac{1}{{27}}\\ &{\left( {x - \frac{3}{5}} \right)^3} = {\left( {\frac{1}{3}} \right)^3}\\ &x - \frac{3}{5} = \frac{1}{3}\\ &x = \frac{1}{3} + \frac{3}{5}\\ &x = \frac{{14}}{{15}} \end{aligned}\)