a: \(\Leftrightarrow4\left(4x-2\right)+12\left(-x+3\right)< =3\left(1-5x\right)\)
=>16x-8-12x+36<=3-15x
=>4x+28<=3-15x
=>19x<=-25
hay x<=-25/19
b: \(\Leftrightarrow6\left(x+4\right)+30\left(-x-5\right)>=10\left(x+3\right)-15\left(x-2\right)\)
=>6x+24-30x-150<=10x+30-15x+30
=>-24x-126<=-5x+60
=>-19x<=186
hay x>=-186/19
\(a,\dfrac{4x-2}{3}-x+3\le\dfrac{1-5x}{4}\\ \Leftrightarrow\dfrac{4\left(4x-2\right)}{12}-\dfrac{12\left(x-3\right)}{12}\le\dfrac{3\left(1-5x\right)}{12}\\ \Leftrightarrow16x-8-12x+36\le3-15x\\ \Leftrightarrow4x+28\le3-15x\\ \Leftrightarrow19x+25\le0\\ \Leftrightarrow x\le-\dfrac{25}{19}\)
\(b,\dfrac{x+4}{5}-x-5\ge\dfrac{x+3}{3}-\dfrac{x-2}{2}\\ \Leftrightarrow\dfrac{6\left(x+4\right)}{30}-\dfrac{30\left(x+5\right)}{30}\ge\dfrac{10\left(x+3\right)}{30}-\dfrac{15\left(x-2\right)}{30}\\ \Leftrightarrow6x+24-30x-150\ge10x+30-15x+30\\ \Leftrightarrow-24x-126\ge-5x+60\\ \Leftrightarrow19x+186\le0\\ \Leftrightarrow x\le-\dfrac{186}{19}\)
