ГДЗ по математике 5 класс Мерзляк ФГОС Задание 904

\[\boxed{\mathbf{904}.\ }\]

\[1)\ \frac{b}{7} = 12\]

\[b = 12 \cdot 7\]

\[b = 84\]

\[Ответ:84.\]

\[2)\frac{169}{m} = 13\]

\[m = \frac{169}{13}\]

\[m = 13\]

\[Ответ:13.\]

\[3)\frac{126}{8 - y} = 21\]

\[8 - y = \frac{126}{21}\]

\[8 - y = 6\]

\[y = 8 - 6\]

\[y = 2\]

\[Ответ:2.\]

\[4)\ \frac{x + 6}{6} = 6\]

\[x + 6 = 6 \cdot 6\]

\[x + 6 = 36\]

\[x = 36 - 6\]

\[x = 30.\]

\[Ответ:\ 30.\]