Чему равен корень уравнения:
1) $\frac{2x}{3} + \frac{5x}{4} = 23$;
2) $\frac{x}{6} - \frac{x}{8} = \frac{7}{36}$;
3) $\frac{3x}{10} - \frac{4}{15} = \frac{x}{6}$?
$\frac{2x}{3} + \frac{5x}{4} = 23$
$\frac{8x + 15x}{12} = 23$
$\frac{23}{12}x = 23$
$x = 23 : \frac{23}{12}$
$x = 23 * \frac{12}{23}$
x = 12
$\frac{x}{6} - \frac{x}{8} = \frac{7}{36}$
$\frac{4x - 3x}{24} = \frac{7}{36}$
$\frac{1}{24}x = \frac{7}{36}$
$x = \frac{7}{36} : \frac{1}{24}$
$x = \frac{7}{36} * \frac{24}{1}$
$x = \frac{14}{3}$
$x = 4\frac{2}{3}$
$\frac{3x}{10} - \frac{4}{15} = \frac{x}{6}$
$\frac{3x}{10} - \frac{x}{6} = \frac{4}{15}$
$\frac{9x - 5x}{30} = \frac{4}{15}$
$\frac{4}{30}x = \frac{4}{15}$
$\frac{2}{15}x = \frac{4}{15}$
$x = \frac{4}{15} : \frac{2}{15}$
$x = \frac{4}{15} * \frac{15}{2}$
x = 2
Пожауйста, оцените решение