\(\dfrac{12x+1}{12}\le\dfrac{4\left(9x+1\right)}{12}-\dfrac{3\left(8x+1\right)}{12}\)
\(\Leftrightarrow\)\(12x+1\le45x+4-32x+3\)
\(\Leftrightarrow12x+1\le13x+7\)
\(\Leftrightarrow12x-13x\le7-1\)
\(\Leftrightarrow-x\le6\)
\(\Leftrightarrow x\ge-6\)