ГДЗ по математике 5 класс Мерзляк Задание 255

\[\boxed{\mathbf{255\ (253)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ 476 + a + 224 =\]

\[= 476 + 224 + a = 700 + a\]

\[при\ a = 221:\ \ \ \ \ \ \]

\[\ 700 + 221 = 921.\]

\[2)\ x + 246 - 46 = x + 200\]

\[при\ x = 137:\ \ \ \ \]

\[137 + 200 = 337.\]

\[3)\ 973 - 243 - y = 730 - y\]

\[при\ y = 258:\ \ \ \ \]

\[730 - 258 = 472\]

\[\boxed{\mathbf{255}\mathbf{\ (}\mathbf{с}\mathbf{)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[y = 4x - 7\]

\[1)\ x = 26:\]

\[y = 4 \cdot 26 - 7 = 104 - 7 = 97.\]

\[2)\ x = 15:\]

\[y = 4 \cdot 15 - 7 = 60 - 7 = 53.\]