\[y = 6 - 9x;\ \ y = 5x - 8\]
\[6 - 9x = 5x - 8\]
\[- 9x - 5x = - 8 - 6\]
\[- 14x = - 14\]
\[x = 1.\]
\[y = 5x - 8 = 5 \cdot 1 - 8 = - 3.\]
\[Ответ:(1;\ - 3)\text{.\ }\]