Question

Помогите дам 15 баллов​

Answer 1

Ответ:

$7 \frac{4}{5} \div 2 \frac{3}{5} = 4 \frac{1}{2} \div a \\ \frac{39}{5} \div \frac{13}{5} = \frac{9}{2} \div a \\ \frac{39 \times 5}{5 \times 13} = \frac{9}{2} \div a \\ 3 = \frac{9}{2} \div a \\ a = \frac{9}{2} \div 3 \\ a = \frac{3}{2} \\ a = 1.5$