Question

2 intregi si 1/7 inmultit cu 1 intreg si 1/5 minus 1/21 impartit la 1/3

Answer 1

$2 \frac{1}{7} = \frac{14}{7} + \frac{1}{7} = \frac{15}{7} \\ 1 \frac{1}{5} = \frac{5}{5} + \frac{1}{5} = \frac{6}{5} \\ \\ \frac{15}{7} \times \frac{6}{5} - \frac{1}{21} \div \frac{1}{3} = \frac{18}{7} - \frac{1}{7} = \frac{17}{7}$
Sper că e destul de explicit :)