Question

( x - 2/ 5 ) : 4/3 = 3/8 ; 5/4 - x nhân 5/6 = 1/4 + 1/3 

Answer 1

\(\left(x-\frac{2}{5}\right):\frac{4}{3}=\frac{3}{8}\)

\(\Rightarrow x-\frac{2}{5}=\frac{3}{8}.\frac{4}{3}=\frac{1}{2}\)

\(\Rightarrow x=\frac{1}{2}+\frac{2}{5}=\frac{9}{10}\)

\(\frac{5}{4}-x.\frac{5}{6}=\frac{1}{4}+\frac{1}{3}\)

\(\Rightarrow\frac{5}{4}-x.\frac{5}{6}=\frac{7}{12}\)

\(\Rightarrow x.\frac{5}{6}=\frac{5}{4}-\frac{7}{12}=\frac{2}{3}\)

\(\Rightarrow x=\frac{2}{3}:\frac{5}{6}=\frac{2}{3}.\frac{6}{5}=\frac{4}{5}\)