Реши уравнение: 3,1x-0,55=1,8x-40,2.

\(3,1x - 0,55 = 1,8x - 40,2\)

\[3,1x - 1,8x = - 40,2 + 0,55\]

\[1,3x = - 39,65\]

\[x = - 39,65\ :1,3\]

\[x = - 30,5.\]