Question

Как решить это уравнение

Answer 1

$\frac{3.6}{x - 1.2} = \frac{7.8}{6.5}$
$3.6 \times 6.5 = 7.8(x - 1.2) \\ (1.2 \times 3) \times 6.5 = \\ = 6.5 \times 1.2 \times (x - 1.2) \\ 3 = x - 1.2 \\ x = 3 + 1.2 \\ x = 4.2$

Answer 2

$\frac{3.6}{x - 1.2} = \frac{7.8}{6.5} \\ 3.6 \times 6.5 = 7.8 \times (x - 1.2) \\ x - 1.2 = \frac{3.6 \times 6.5}{7.8} \\ x = \frac{1.8 \times 6.5}{3.9} + 1.2 \\ x = 4. 2$