Решебник по алгебре 9 класс Мерзляк Задание 227

\[\boxed{\text{227\ (227).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[f(x) = 3x - 2\]

\[1)\ f(3) = 3 \cdot 3 - 2 = 7\]

\[f(0) = - 2\]

\[f( - 0,2) = - 3 \cdot 0,2 - 2 =\]

\[= - 0,6 - 2 = - 2,6\]

\[f(1,6) = 3 \cdot 1,6 - 2 =\]

\[= 4,8 - 2 = 2,8\]

\[2)\ f(x) = 10\]

\[3x - 2 = 10\]

\[3x = 12\]

\[x = 4.\]

\[f(x) = - 6\]

\[3x - 2 = - 6\]

\[3x = - 4\]

\[x = - \frac{4}{3}.\]

\[f(x) = 0\]

\[3x - 2 = 0\]

\[3x = 2\]

\[x = \frac{2}{3}.\]