Упростите выражение и найдите его значение:
1) $\frac{3}{8}x + \frac{4}{9}x - \frac{5}{12}x$, если x = $3\frac{3}{29}$;
2) $\frac{9}{10}с - \frac{2}{15}с - \frac{3}{5}с$, если с = 2,4;
3) $3\frac{3}{5}y - 2\frac{1}{3}y - \frac{1}{15}y$, если y = 10.
$\frac{3}{8}x + \frac{4}{9}x - \frac{5}{12}x = \frac{27}{72}x + \frac{32}{72}x - \frac{30}{72}x = \frac{29}{72}x = \frac{29}{72} * 3\frac{3}{29} = \frac{29}{72} * \frac{90}{29} = \frac{1}{4} * \frac{5}{1} = \frac{5}{4} = 1\frac{1}{4}$
$\frac{9}{10}с - \frac{2}{15}с - \frac{3}{5}с = \frac{27}{30}с - \frac{4}{30}с - \frac{18}{30}с = \frac{5}{30}с = \frac{1}{6}с = \frac{1}{6} * 2,4 = \frac{1}{6} * \frac{24}{10} = \frac{1}{1} * \frac{4}{10} = \frac{2}{5}$
$3\frac{3}{5}y - 2\frac{1}{3}y - \frac{1}{15}y = 3\frac{9}{15}y - 2\frac{5}{15}y - \frac{1}{15}y = 1\frac{1}{5}y = \frac{6}{5} * 10 = 6 * 2 = 12$
Пожауйста, оцените решение
