Question

$4.8 \div 0.4 = 12 \div (0.4 + 3x)$
Решите пожалуйста!!!!​

Answer 1

$4.8 \div 0.4 = 12 \div (0.4 + 3x) \\ \\ 0.4 + 3x = \frac{5}{24} \times 4.8 \\ \\ 0.4 + 3x = \frac{5}{24} \times \frac{24}{5} \\ \\ 0.4 + 3x = 1 \\ \\ 3x = 1 - 0.4 \\ 3x = 0.6 \\ \\ x = 0.2$