\[\boxed{\text{256\ (256).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 2,5 - 3x = 3 \cdot (x - 2,5) - 2\]
\[2,5 - 3x = 3x - 7,5 - 2\]
\[6x = 2,5 + 7,5 + 2\]
\[6x = 12\]
\[x = 2\]
\[Ответ:x = 2.\]
\[2)\ 17(2 - 3x) - 5(x + 12) =\]
\[= 8(1 - 7x) - 34\]
\[34 - 51x - 5x - 60 =\]
\[= 8 - 56x - 34\]
\[- 56x + 56x = 8 - 34 - 34 + 60\]
\[0x = 0\]
\[Ответ:x - любое\ число.\]