Ta có \(\frac{2}{5}x+\frac{1}{3}x=\frac{3}{5}\)
\(\Rightarrow x.\left(\frac{2}{5}+\frac{1}{3}\right)=\frac{3}{5}\)
\(\Rightarrow x.\frac{8}{15}=\frac{3}{5}\)
\(\Rightarrow x=\frac{9}{8}\)
\(\frac{2}{5}\text{ x }x+\frac{1}{3}\text{ x }x=\frac{3}{5}\)
\(\left(\frac{2}{5}+\frac{1}{3}\right)\text{ x }x=\frac{3}{5}\)
\(\frac{11}{15}\text{ x }x=\frac{3}{5}\)
\(x=\frac{3}{5}\text{ : }\frac{11}{15}\)
\(x=\frac{9}{11}\)