\[3x + 12 > 2(4x - 3) - 5x\]
\[3x + 12 + 5x > 8x - 6\]
\[8x - 8x > - 6 - 12\]
\[0x > - 12\]
\[x - любое\ число.\]
\[Ответ:x = ( - \infty; + \infty).\]