\(16.2x\left(x-\dfrac{1}{7}\right)=0\)
\(\Leftrightarrow32x\left(x-\dfrac{1}{7}\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}32x=0\\x-\dfrac{1}{7}=0\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=\dfrac{1}{7}\end{matrix}\right.\)
16.2x(x-\(\dfrac{1}{7}\)) = 0
<=> 32x2 - \(\dfrac{32}{7}\)x = 0
<=> x(32x-\(\dfrac{32}{7}\)) = 0
<=> \(\left\{{}\begin{matrix}x=0\\32x-\dfrac{32}{7}=0\end{matrix}\right.\)
<=> \(\left\{{}\begin{matrix}x=0\\32x=\dfrac{32}{7}\end{matrix}\right.\)
<=> \(\left\{{}\begin{matrix}x=0\\x=\dfrac{1}{7}\end{matrix}\right.\)