\(yX\frac{1}{2}X\frac{3}{4}+y:\frac{8}{5}-\frac{y}{2}=\frac{1}{2}\)
\(yX\frac{3}{8}+yX\frac{5}{8}-y:2=\frac{1}{2}\)
\(yX\left(\frac{3}{8}+\frac{5}{8}\right)-y:\frac{2}{1}=\frac{1}{2}\)
\(yX1-yX\frac{1}{2}=\frac{1}{2}\)
\(yX\left(1-\frac{1}{2}\right)=\frac{1}{2}\)
\(yX\frac{1}{2}=\frac{1}{2}\)
\(y=\frac{1}{2}:\frac{1}{2}\)
\(y=1\)