ГДЗ по математике 5 класс Мерзляк Задание 490

\[\boxed{\ \mathbf{490\ (490)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 8 \cdot (x - 14) = 56\]

\[x - 14 = 56\ :8\]

\[x - 14 = 7\]

\[x = 7 + 14\]

\[x = 21\]

\[Ответ:21.\]

\[2)\ (46 - x) \cdot 19 = 418\]

\[46 - x = 418\ :19\]

\[46 - x = 22\]

\[x = 46 - 22\]

\[x = 24\]

\[Ответ:24.\]

\[3)\ 9 \cdot (143 - 13x) = 234\]

\[143 - 13x = 234\ :9\]

\[143 - 13x = 26\]

\[13x = 143 - 26\]

\[13x = 117\]

\[x = 117\ :13\]

\[x = 9\]

\[Ответ:9.\]

\[4)\ 17 \cdot (5x - 16) = 238\]

\[5x - 16 = 238\ :17\]

\[5x - 16 = 14\]

\[5x = 14 + 16\]

\[5x = 30\]

\[x = 30\ :5\]

\[x = 6\]

\[Ответ:6.\]