Решебник по математике 5 класс Мерзляк ФГОС Задание 701

 

\[\boxed{\mathbf{701\ (701)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 90{^\circ}\ :18 \cdot 7 = 5 \cdot 7 = 35{^\circ}\]

\[2)\ 80{^\circ}\ :12 \cdot 5 = 15 \cdot 5 = 75{^\circ}\]

\[\boxed{\mathbf{701}.}\]

\[1)\ 4x + 5x + 47 = 164\]

\[9x = 164 - 47\]

\[9x = 117\]

\[x = 117\ :9\]

\[x = 13.\]

\[2)\ 7x - 4x + 46 = 211\]

\[3x = 211 - 46\]

\[3x = 165\]

\[x = 165\ :3\]

\[x = 55.\]

\[3)\ (358 - x)\ :21 = 13\]

\[358 - x = 13 \cdot 21\]

\[358 - x = 273\]

\[x = 358 - 273\]

\[x = 85.\]

\[4)\ 9 \cdot (223 - x) = 1701\]

\[223 - x = 1701\ :9\]

\[223 - x = 189\]

\[x = 223 - 189\]

\[x = 34.\]