\[\boxed{\mathbf{503.}\mathbf{\ }}\]
\[1)\ 1,7 \cdot (1,6 - x) = 2,38\]
\[1,6 - x = 2,38\ :1,7\]
\[1,6 - x = 238\ :170\]
\[1,6 - x = 1,4\]
\[x = 1,6 - 1,4\]
\[x = 0,2.\]
\[2)\ 1,28\ :x + 3,24 = 4,84\]
\[1,28\ :x = 4,84 - 3,24\]
\[1,28\ :x = 1,6\]
\[x = 1,28\ :1,6\]
\[x = 12,8\ :16\]
\[x = 0,8.\]