Question

2:x/5=4/9 решите без ошибок

Answer 1

Ответ:

$2 \times \frac{5}{x} = \frac{4}{9} \\ \frac{10}{x} = \frac{4}{9} \\ 90 = 4x \\ 4x = 90 \\ x = 90 \div 4 \\ x = \frac{45}{2}$