\[2\frac{1}{3}(y - 0,5) = \frac{7}{9}\]
\[y - 0,5 = \frac{7}{9}\ :\frac{7}{3}\]
\[y - 0,5 = \frac{7}{9} \cdot \frac{3}{7}\]
\[y - \frac{1}{2} = \frac{1}{3}\]
\[y = \frac{1^{\backslash 2}}{3} + \frac{1^{\backslash 3}}{2}\]
\[y = \frac{5}{6}.\]