Решение:
\[ \frac{x}{0.6} = \frac{17}{1.2} \]
\[ x \times 1.2 = 17 \times 0.6 \]
\[ 1.2x = 10.2 \]
\[ x = \frac{10.2}{1.2} \]
\[ x = \frac{102}{12} \]
\[ x = 8.5 \]
Ответ: x = 8,5