\[\boxed{\mathbf{1093\ (1084)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 7x - 18x + 25x - 6x = 8x\]
\[2) - 0,3b - 1,4b + 3,1b +\]
\[+ 0,7b = 2,1b\]
\[3)\ - 16b - + 9b =\]
\[= - 7a - 7b\]
\[4) - + 0,9p - +\]
\[+ + 1,4p = - 2k + 2,3p\]