\[ax - 6 = 4a - 7x\]
\[ax + 7x = 4a + 6\]
\[x(a + 7) = 2 \bullet (2a + 3)\text{\ \ \ \ }\]
\[(a + 7)x = 4a + 6\]
\[x = \frac{4a + 6}{a + 7}\]
\[a = - 7:\]
\[нет\ решения,\ так\ как\]
\[( - 7 + 7)x = 4 \cdot ( - 7) + 6\]
\[0x = - 28 + 6\]
\[0x \neq - 22.\]
\[a \neq - 7:\]
\[x = \frac{4a + 6}{a + 7}\]
\[Ответ:нет\ решения\ при\ \]
\[a = - 7;\]
\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ x = \frac{4a + 6}{a + 7}\ при\ a \neq - 7.\]