\[\boxed{\mathbf{1097\ (1088)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 5a + 5b = 5 \cdot (a + b)\]
\[2)\ ax - bx = x(a - b)\]
\[3) - 6a + 6b - 6 =\]
\[= - 6 \cdot (a - b + 1)\]
\[4)\ 12a - 6b + 18c =\]
\[= 6 \cdot (2a - b + 3c)\]
\[5)\ 0,3ab + 1,3ac - a =\]
\[= a(0,3b + 1,3c - 1)\]
\[6)\ 9m - 6n + 12k - 15 =\]
\[= 3 \cdot (3m - 2n + 4k - 5)\]