Question

Знайти x 5:x=7:(8-x)
Найти x 5:x=7:(8-x)

Answer 1

$\frac{5}{x} = \frac{7}{8 - x} \\ 7x = 5(8 - x) \\ 7x = 40 - 5x \\ 7x + 5x = 40 \\ 12x = 40 \\ x = 40 \div 12 \\ x = 10 \div 3 \\ x = 3 \frac{1}{3}$