Решебник по математике 6 класс Мерзляк ФГОС Задание 1164

\[\boxed{\mathbf{1164\ (1156)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ \frac{x}{3} + \frac{x}{12} = \frac{15}{4}\ \ | \cdot 12\]

\[4x + x = 45\]

\[5x = 45\]

\[x = 9\]

\[Ответ:9.\]

\[2)\frac{7x}{9} - \frac{3x}{4} = \frac{5}{12}\ \ \ \ | \cdot 36\]

\[28x - 27x = 15\]

\[x = 15\]

\[Ответ:15.\]

\[3)\ 1 - \frac{8x}{15} = \frac{4x}{9}\ \ \ | \cdot 45\]

\[45 - 24x = 20x\]

\[20x + 24x = 45\]

\[44x = 45\]

\[x = \frac{45}{44}\]

\[x = 1\frac{1}{44}\]

\[Ответ:1\frac{1}{44}.\]