Question

Решите Плиз математику.

Answer 1

Ответ:

$x \div 5 = 9 \\ x = 9 \times 5 \\ x = 45$

$\frac{1}{9} \div x = \frac{1}{3} \\ \frac{1}{9} \times \frac{1}{x} = \frac{1}{3} \\ \frac{1}{9x} = \frac{1}{3} \\ 9x = 3 \\ x = \frac{1}{3}$

$1 \frac{4}{5} \times x = 1 \\ x =1 \div 1 \frac{4}{5} = 1 \div \frac{9}{4} = 1 \times \frac{4}{9} = \frac{4}{9} \\ x = \frac{4}{9}$

$1 \frac{4}{5} \times x = 2 \frac{2}{5} \\ x = 2 \frac{2}{5} \div 1 \frac{4}{5} = \frac{12}{5} \times \frac{5}{9} = \frac{4}{3} \\ x = \frac{4}{3}$