=>(2x+5)[1/6-1/3(x-10)]=0
\(\Leftrightarrow\left[{}\begin{matrix}2x+5=0\\\dfrac{1}{3}\left(x-10\right)=\dfrac{1}{6}\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{5}{2}\\x=\dfrac{21}{2}\end{matrix}\right.\)
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