\[\boxed{\mathbf{1161\ (1153)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ \frac{x + 0,4}{8} = \frac{0,7 - x}{3}\ \ \ \ | \cdot 24\]
\[3 \cdot (x + 0,4) = 8 \cdot (0,7 - x)\]
\[3x + 1,2 = 5,6 - 8x\]
\[3x + 8x = 5,6 - 1,2\]
\[11x = 4,4\]
\[x = 0,4\]
\[Ответ:0,4.\]
\[2)\frac{5}{6} = \frac{5x + 6}{2x + 3,2}\]
\[\frac{5}{6} = \frac{5x + 6}{2 \cdot (x + 1,6)}\ \ \ | \cdot 6 \cdot\]
\[\cdot (x + 1,6);\ \ \ x \neq - 1,6\]
\[5 \cdot (x + 1,6) = 3 \cdot (5x + 6)\]
\[5x + 8 = 15x + 18\]
\[15x - 5x = 8 - 18\]
\[10x = - 10\]
\[x = - 1\]
\[Ответ:\ - 1.\]