\[a \cdot x = 5 + 2x\]
\[ax - 2x = 5\]
\[x(a - 2) = 5\]
\[при\ a \neq 2:\]
\[x = \frac{5}{a - 2};\]
\[a - 2\ должно\ быть\ делителем\ числа\ 5.\]
\[a - 2\ должно\ быть\ равно \pm 1;\ \pm 5.\]
\[1)\ a - 2 = 1\]
\[при\ a = 3:\]
\[x = \frac{5}{3 - 2} = \frac{5}{1} = 5.\]
\[2)\ a - 2 = - 1\]
\[при\ a = 1:\]
\[x = \frac{5}{1 - 2} = \frac{5}{- 1} = - 5.\]
\[3)\ a - 2 = 5:\]
\[при\ \ a = 7:\]
\[x = \frac{5}{7 - 2} = \frac{5}{5} = 1.\]
\[4)\ a - 2 = - 5\]
\[при\ a = - 3:\]
\[x = \frac{5}{- 3 - 2} = - 1.\]