ГДЗ по алгебре 8 класс Макарычев ФГОС Задание 1046

\[\boxed{\text{1046.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]

\[\textbf{а)}\ 10x = 3b\]

\[x = 0,3b\]

\[x < 0 \Longrightarrow \ \ при\ \ b < 0.\]

\[\textbf{б)}\ x - 4 = b\]

\[x = b + 4\]

\[x < 0 \Longrightarrow \ \ при\ b + 4 < 0;\ \ \]

\[b < - 4.\]

\[\textbf{в)}\ 3x - 1 = b + 2\]

\[3x = b + 3\]

\[x = \frac{b + 3}{3}\]

\[x < 0 \Longrightarrow \ \ при\ \frac{b + 3}{3} < 0\]

\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ b + 3 < 0;\ \ \]

\[b < - 3.\]

\[\textbf{г)}\ 3x - 3 = 5b - 2\]

\[3x = 5b + 1\]

\[x = \frac{5b + 1}{3}\]

\[x < 0 \Longrightarrow \ при\ \ \ \ \frac{5b + 1}{3} < 0\]

\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 5b + 1 < 0\]

\[\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 5b < - 1;\ \]

\[\ b < - 0,2.\]