Question

только первый вариант ✌️​

Answer 1

Задание 4.

а)

$\frac{x}{5} = \frac{4}{20} \\ x = \frac{4 \times 5}{20} \\ x = \frac{20}{20} \\ x = 1$

б)

$\frac{6}{x} = \frac{18}{30} \\ x = \frac{6 \times 30}{18} \\ x = \frac{180}{18} \\ x = 10$

в)

$\frac{2x - 4}{7} = \frac{16}{28} \\ 2x - 4 = \frac{7 \times 16}{28} \\ 2x - 4 = \frac{112}{28} \\ 2x - 4 = 4 \\ 2x = 4 + 4 \\ 2x = 8 \\ x = 8 \div 2 \\ x = 4$

оцените ответ