Question

Реши пропорцию.

$\frac{138,6}{31,5}$ = $\frac{x}{0,5}$

х=?

Answer 1

$\frac{138.6}{31.5} = \frac{x}{0.5} \\ x = \frac{138.6 \times 0.5}{31.5} = \frac{69.3}{31.5} = \frac{693}{10} \div \frac{315}{10} = \frac{693}{315} = \frac{ 11}{5} = 2.2$
Ответ: 2.2

Answer 2

$\frac{ \frac{ \frac{693}{5} }{63} }{2} = \frac{ \frac{x}{1} }{2} \\ \\ \frac{22}{5} = 2x \\ \\ 2x = \frac{22}{5} \\ \\ x = 2.2$