ГДЗ по математике 6 класс Мерзляк Задание 1163

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\[1)\frac{x}{12} - \frac{x}{8} = \frac{7}{6}\ \ | \cdot 24\]

\[2x - 3x = 28\]

\[- x = 28\]

\[x = - 28\]

\[Ответ:\ - 28.\]

\[2)\frac{13x}{21} + \frac{9x}{14} = - 1\ \ \ | \cdot 42\]

\[26x + 27x = - 42\]

\[53x = - 42\]

\[x = - \frac{42}{53}\]

\[Ответ:\ - \frac{42}{53}.\]

\[3) - \frac{3x}{10} - \frac{7}{15} = \frac{x}{6}\ \ | \cdot 30\]

\[9x - 14 = 5x\]

\[5x + 9x = - 14\]

\[14x = - 14\]

\[x = - 1\]

\[Ответ:\ - 1.\]