Ответ:
\[\left(\frac{8}{5}-\frac{1}{4}\right)x=\frac{27}{8}\]
\[\frac{27}{20}x=\frac{27}{8},\qquad x=\frac{27}{8}\cdot\frac{20}{27}=\frac{5}{2}\]
Ответ: \(x=\frac{5}{2}\).
\[\left(\frac{8}{5}-\frac{1}{4}\right)x=\frac{27}{8}\]
\[\frac{27}{20}x=\frac{27}{8},\qquad x=\frac{27}{8}\cdot\frac{20}{27}=\frac{5}{2}\]
Ответ: \(x=\frac{5}{2}\).