Question

РЕШИТЕ
1 вариант 3 задания!
Даю 40 баллов!!!

Answer 1

3.

$a) \: 3.5 \times x = 0.7 \\ x = 0.7 \div 3.5 \\ x = \frac{7}{10} \div \frac{35}{10} \\ x = \frac{7}{10} \times \frac{10}{35} \\ x = \frac{1}{5} \\ x = 0.2$

$b) \: 3.5 \div x = 0.7 \\ \frac{3.5}{x} = 0.7 \\ x = \frac{3.5}{0.7} \\ x = \frac{35}{10} \times \frac{10}{7} \\ x = 5$