\[\boxed{\mathbf{1035\ (1035)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\textbf{а)}\ 1 - 0,2x = 2,6\]
\[- 0,2x = 2,6 - 1\]
\[- 0,2x = 1,6\]
\[- 2x = 16\]
\[x = 16\ :( - 2)\]
\[x = - 8.\]
\[Ответ:x = - 8.\]
\[\textbf{б)}\ 3 - (x + 1,9) = - 1,1\]
\[- (x + 1,9) = - 1,1 - 3\]
\[- (x + 1,9) = - (1,1 + 3)\]
\[- (x + 1,9) = - 4,1\]
\[x + 1,9 = 4,1\]
\[x = 4,1 - 1,9\]
\[x = 2,2.\]
\[Ответ:x = 2,2.\]