ГДЗ по математике 5 класс Мерзляк Задание 669

\[\boxed{\ \mathbf{669\ (669)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 1376\ :(34 - x) = 86\]

\[34 - x = 1376\ :86\]

\[x = 34 - 16\]

\[x = 18\]

\[Ответ:18.\]

\[2)\ 9680\ :(x + 219) = 16\]

\[x + 219 = 9680\ :16\]

\[x = 605 - 219\]

\[x = 386\ \]

\[Ответ:386.\]

\[3)\ (x - 57)\ :29 = 205\]

\[x - 57 = 205 \cdot 29\]

\[x = 5945 + 57\]

\[x = 6002\ \]

\[Ответ:6002.\]

\[4)\ (x - 72) \cdot 9 = 927\]

\[x - 72 = 927\ :9\]

\[x = 103 + 72\]

\[x = 175\]

\[Ответ:175.\]