Question

Выполните действия:

$\frac{4}{9} (2.7m - 2 \frac{1}{4} n) - 4.2( \frac{5}{7} m - 0.5n)$

Answer 1

$\frac{4}{9} (2.7m - \frac{9}{4} n) - 4.2( \frac{5}{7} m - 0.5n) \\ \frac{4}{9} ( \frac{27}{10} m - \frac{9}{4} n) - \frac{21}{5} ( \frac{5}{7} m - \frac{1}{2} n) \\ \frac{6}{5} m - n - 3m + \frac{21}{10} n \\ - \frac{9}{5} m + \frac{11}{10} n$