đk : x khác -4 ; 4
\(\Rightarrow96+\left(1-3x\right)\left(x+4\right)=\left(2x+1\right)\left(x-4\right)-5\left(x^2-16\right)\)
\(\Leftrightarrow96x+x+4-3x^2-12x=2x^2-7x-4-5x^2+80\)
\(\Leftrightarrow92x=72\Leftrightarrow x=\dfrac{72}{92}=\dfrac{18}{23}\)(tm)