Answer:
[tex]f(x) \: = \: 3x \: - 2 \: then \: when \\ \: f(x) \: = - 11 \: then \: x \: = \: - 3.[/tex]
[tex]if \: f(x) \: = \: 3x \: - 2 \: then \: when \\ \: f(x) \: = - \frac{2}{3} \: then \: x \: = \: \frac{4}{9} .[/tex]
