\[1)\ (x + 3) + i\]
\[x + 3 = 1\]
\[x = - 2\]
\[Ответ:\ - 2.\]
\[2)\ 3x - 8i\]
\[3x = - 8\]
\[x = - \frac{8}{3}\]
\[Ответ:\ - \frac{8}{3}.\]
\[3)\ 0,4 - (x - 2)i\]
\[0,4 = - (x - 2)\]
\[x - 2 = - 0,4\]
\[x = 1,6\]
\[Ответ:\ \ 1,6.\]
\[4) - 1 + 2xi\]
\[- 1 = 2x\]
\[x = - 0,5\]
\[Ответ:\ - 0,5.\]