\[15x - 1 = 3 \cdot (7x - 1) - 2\]
\[15x - 1 = 21x - 3 - 2\]
\[15x - 21x = - 5 + 1\]
\[- 6x = - 4\]
\[x = \frac{4}{6}\]
\[\]