Find the vector equation for the line where the planes
2x - 9y + 9z = 0 and -6y + 7z = 1
intersect. Write your answer in the form \textbf{r} (t) = \langle x_0, y_0, z_0 \rangle + t \langle a, b, c \rangle.
Hint: Use "<1,2,3>" for (1, 2, 3).
\textbf{r} (t) = \boxed{} + t \boxed{}