Question

Даю 20 баллов:
Решите уравнение

Answer 1

Ответ:

$\frac{3x - 1}{7} - \frac{2x + 1}{2} = \frac{x}{14} - 1 \\ \frac{3x - 1}{7} - \frac{2x + 1}{2} - \frac{x}{14} = 1 \\ \frac{2(3x - 1) - 7(2x + 1) - x}{14} = 1 \\ \frac{6x - 2 - 14x - 4 - x}{14} = 1 \\ \frac{ - 9x - 6}{14} = 1 \\ - 9x - 6 = 14 \times 1 \\ - 9x = 14 + 6 \\ - 9x = 20 \\ x = 20 \div ( - 9) \\ x = - 2 \frac{2}{9}$