\[5,8 - 1,6x = 0,3x - 1,8\]
\[- 1,6x - 0,3x = - 1,8 - 5,8\]
\[- 1,9x = - 7,6\]
\[x = - 7,6\ :( - 1,9)\]
\[x = 76\ :19\]
\[x = 4.\]