Решебник по математике 6 класс Мерзляк ФГОС Задание 111

\[\boxed{\mathbf{111\ (111).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 2 \cdot 2 \cdot 5 \Longrightarrow 1,\ 2,\ 4,\ 10,\ 5,\ 20.\]

\[2)\ 3 \cdot 5 \cdot 7 \Longrightarrow 1,\ 3,\ 5,\ 7,\ 15,\ 21,\ 35,\ \]

\[105.\]

\[\boxed{\mathbf{111}.}\]

\[1)\ 25x - ax - 9 = 279\]

\[25x - ax = 279 + 9\]

\[x(25 - a) = 288\]

\[x = 16:\]

\[16 \cdot (25 - a) = 288\]

\[25 - a = 288\ :16\]

\[25 - a = 18\]

\[a = 25 - 18\]

\[a = 7.\]

\[Ответ:при\ a = 7.\]

\[2)\ (x + 14)\ :a = 13\]

\[x = 103:\]

\[(103 + 14)\ :a = 13\]

\[117\ :a = 13\]

\[a = 117\ :13\]

\[a = 9.\]

\[Ответ:при\ a = 9.\]