\(x-\frac{5}{6}=x\times\frac{5}{8}\)
\(\Rightarrow\frac{5}{6}=x-x\times\frac{5}{8}\)
\(\Rightarrow\frac{5}{6}=x\times\left(1-\frac{5}{8}\right)\)
\(\Rightarrow\frac{5}{6}=x\times\frac{3}{8}\)
\(\Rightarrow x=\frac{5}{6}:\frac{3}{8}=\frac{5}{6}\times\frac{8}{3}\)
\(\Rightarrow x=\frac{40}{18}=\frac{20}{9}\)
fan TBoys nè, bạn nhớ ấn đúng cho mk nha
\(x-\frac{5}{6}=\frac{5x}{8}\)
\(\frac{8x}{8}-\frac{5x}{8}=\frac{5}{6}\)
\(\frac{3x}{8}=\frac{5}{6}\)
\(3x=\frac{5\times8}{6}=\frac{20}{3}\)
\(x=\frac{20}{3}:3=\frac{20}{9}\)