Решебник по алгебре 7 класс Мерзляк Задание 55

\[\boxed{\text{55\ (55).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]

\[1)\ 0,1x = b\]

\[Пусть\ b = 10:\ \ \]

\[0,1x = 10\ \ \]

\[x = \frac{10}{0,1} = 100.\]

\[2)\ bx = 21\ \ \]

\[x = \frac{21}{b}\]

\[Пусть\ b = 3:\ \ \]

\[x = \frac{21}{3} = 7.\]

\[3)\ \frac{1}{6}x = b\ \ \]

\[x = 6b\]

\[Пусть\ b = 2:\ \]

\[\ x = 6 \cdot 2 = 12.\]

\[4)\ bx = \frac{1}{6}\text{\ \ \ \ }\]

\[x = \frac{1}{6b}\]

\[Пусть\ b = \frac{1}{6}:\ \]

\[x = \frac{6}{6} = 1.\]