Вопрос:

Ответ:

\[f(x) = - \frac{1}{3}x + 2\]

\[f(x) = 1:\]

\[1 = - \frac{1}{3}x + 2\]

\[\frac{1}{3}x = 2 - 1\]

\[\frac{1}{3}x = 1\]

\[x = 3.\]