Упростите выражение:
а) $\frac{1}{6} * (-9y)$;
б) $14y * (-\frac{2}{7})$;
в) $(-\frac{2}{5}) * (-10x)$;
г) $-4x * (-\frac{5}{12})$;
д) $3y * (-\frac{7}{15})$;
е) $\frac{11}{26} * (-13y)$.
$\frac{1}{6} * (-9y) = (-1) * \frac{1}{6} * 9y = (-1) * \frac{1}{2} * 3y = -\frac{3}{2}y = -1,5y$
$14y * (-\frac{2}{7}) = (-1) * 14y * \frac{2}{7} = (-1) * 2y * 2 = -4y$
$(-\frac{2}{5}) * (-10x) = \frac{2}{5} * 10 = 2 * 2 = 4$
$-4x * (-\frac{5}{12}) = 4x * \frac{5}{12} = \frac{5}{3}x = 1\frac{2}{3}x$
$3y * (-\frac{7}{15}) = (-1) * 3y * \frac{7}{15} = (-1) * y * \frac{7}{5} = -\frac{7}{5}y = -1,4y$
$\frac{11}{26} * (-13y) = (-1) * \frac{11}{26} * 13y = (-1) * \frac{11}{2} * y = -5,5y$
Пожауйста, оцените решение