\[- 2\frac{1}{3}x = \frac{7}{15}\]
\[x = \frac{7}{15}\ :\left( - 2\frac{1}{3} \right)\]
\[x = \frac{7}{15}\ :\left( - \frac{7}{3} \right)\]
\[x = - \frac{7 \cdot 3}{15 \cdot 7}\]
\[x = - \frac{1}{5}\]
\[x = - 0,2.\]