Данное уравнение:
\( -(1\frac{2}{3} - 8,1) - x = 6\frac{1}{3} \)
\( 1\frac{2}{3} = \frac{1 \cdot 3 + 2}{3} = \frac{5}{3} \)
\( 8,1 = 8\frac{1}{10} = \frac{8 \cdot 10 + 1}{10} = \frac{81}{10} \)
\( 6\frac{1}{3} = \frac{6 \cdot 3 + 1}{3} = \frac{19}{3} \)
\( -(\frac{5}{3} - \frac{81}{10}) - x = \frac{19}{3} \)
\( \frac{5}{3} = \frac{5 \cdot 10}{3 \cdot 10} = \frac{50}{30} \)
\( \frac{81}{10} = \frac{81 \cdot 3}{10 \cdot 3} = \frac{243}{30} \)
\( \frac{50}{30} - \frac{243}{30} = \frac{50 - 243}{30} = \frac{-193}{30} \)
\( -(\frac{-193}{30}) - x = \frac{19}{3} \)
\( \frac{193}{30} - x = \frac{19}{3} \)
\( x = \frac{193}{30} - \frac{19}{3} \)
\( \frac{19}{3} = \frac{19 \cdot 10}{3 \cdot 10} = \frac{190}{30} \)
\( x = \frac{193}{30} - \frac{190}{30} = \frac{193 - 190}{30} = \frac{3}{30} \)
\( x = \frac{3}{30} = \frac{1}{10} \)
Ответ: x = \( \frac{1}{10} \) или x = 0,1.