\(3x^2-50x=0\)
\(\Leftrightarrow x\left(3x-50\right)=0\)
\(\Leftrightarrow\hept{\begin{cases}x=0\\3x-50=0\end{cases}}\Leftrightarrow\hept{\begin{cases}x=50\\x=\frac{50}{3}\end{cases}}\)
Tổng là: \(\frac{50}{3}+50=\frac{200}{3}\)
\(3x^2-50x=0\Rightarrow x\left(3x-50\right)=0\Rightarrow\orbr{\begin{cases}x=0\\3x-50=0\end{cases}\Rightarrow\orbr{\begin{cases}x=0\\x=\frac{50}{3}\end{cases}}}\)
\(\Rightarrow x+x=\frac{50}{3}\)