\[\left\{ \begin{matrix} 3x + 5y + 15 = 0 \\ y = 0\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[3x + 15 = 0\]
\[3x = - 15\]
\[x = - 5\]
\[\left\{ \begin{matrix} 3x + 5y + 15 = 0 \\ x = 0\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\ \end{matrix} \right.\ \]
\[5y + 15 = 0\]
\[5y = - 15\]
\[y = - 3\]
\[пересечение\ с\ Ox:\ \ \ ( - 5;0);\ \ \ \ \]
\[\text{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }с\ \ Oy:\ \ \ (0;\ - 3).\]