Đáp án+Giải thích các bước giải:
$\\(x+10)(\dfrac{720}{x-6})$ $ĐK x\neq 6$ $\\<=>\left[ \begin{array}{l}x+10=0\\720.\dfrac{1}{(x-6)}=0\end{array} \right.$ $\\<=>\left[ \begin{array}{l}x=0-10\\\dfrac{1}{(x-6)}=0.720\end{array} \right.$ $\\<=>\left[ \begin{array}{l}x=-10\\\dfrac{1}{(x-6)}=0\end{array} \right.$ $\\<=>\left[ \begin{array}{l}x=-10\\x-6=0\end{array} \right.$ $\\<=>\left[ \begin{array}{l}x=-10(TM)\\x=6(KTM)\end{array} \right.$ $\\\text{Vậy x=-10}$
