\(\frac{5}{3}:\frac{x}{4}=6:0,3\)

\(\frac{20}{3x}=20\)

\(3x=1\)

  \(x=\frac{1}{3}\)

Vậy \(x=\frac{1}{3}\)

\(\frac{5}{3}\div\frac{x}{4}=6\div0,3\)

\(\Rightarrow\frac{5}{3}\div\frac{x}{4}=20\)

\(\Rightarrow\frac{x}{4}=\frac{1}{12}\)

\(\Rightarrow\frac{3x}{12}=\frac{1}{12}\)

\(\Rightarrow3x=1\)

\(\Rightarrow x=\frac{1}{3}\)

~Study well~

#KSJ

1, 3^4

2, 5^405

3, -20/3

4, 4

                                                                             KHÔNG BÍT ĐÚNG HAY KO =>HIHIHIHI

\(4\frac{1}{3}:\frac{x}{4}=\frac{6}{0,3}\)

\(\Rightarrow\frac{13}{3}:\frac{x}{4}=20\)

\(\Rightarrow\frac{x}{4}=\frac{13}{3}:20\)

\(\Rightarrow\frac{x}{4}=\frac{13}{60}\)

\(\Rightarrow x=\frac{13}{60}.4\)

\(\Rightarrow x=\frac{13}{15}\)

\(4\frac{1}{3}:\frac{x}{4}=\frac{6}{0.3}\)

\(\frac{13}{3}:\frac{x}{4}=20\)

\(\frac{x}{4}=\frac{13}{3}:20\)

\(\frac{x}{4}=\frac{13}{60}\)

\(x=\frac{13}{60}.4\)

\(\frac{4}{5}x-\frac{4}{3}\left(x-\frac{1}{4}\right)=0,3+\left(-\frac{1}{3}\right)^2\)

\(\Rightarrow\frac{4}{5}x-\frac{4}{3}x+\frac{1}{3}=0,3+\frac{1}{9}\)

\(\Rightarrow\frac{-8}{15}x+\frac{1}{3}=\frac{37}{90}\)

\(\Rightarrow-\frac{8}{15}x=\frac{7}{90}\)

\(\Rightarrow x=-\frac{7}{48}\)