\(\left(\dfrac{3}{8}x-\dfrac{11}{5}\right)\cdot\left(-\dfrac{2}{7}x+0,85\right)=0\)
`=>`\(\left[{}\begin{matrix}\dfrac{3}{8}x-\dfrac{11}{5}=0\\-\dfrac{2}{7}x+\dfrac{17}{20}=0\end{matrix}\right.\)
\(\left[{}\begin{matrix}\dfrac{3}{8}x=\dfrac{11}{5}\\-\dfrac{2}{7}x=-\dfrac{17}{20}\end{matrix}\right.\)
\(\left[{}\begin{matrix}x=\dfrac{11}{5}\cdot\dfrac{8}{3}\\x=\left(-\dfrac{17}{20}\right)\cdot\left(-\dfrac{7}{2}\right)\end{matrix}\right.\)
\(\left[{}\begin{matrix}x=\dfrac{88}{15}\\x=\dfrac{119}{40}\end{matrix}\right.\)
`=>`\(x\in\left\{\dfrac{88}{15};\dfrac{119}{40}\right\}\)
`<=>` \(\left[{}\begin{matrix}\dfrac{3}{8}x-\dfrac{11}{5}=0\\-\dfrac{2}{7}x+0,85=0\end{matrix}\right.\)
`<=>` \(\left[{}\begin{matrix}x=\dfrac{88}{15}\\x=\dfrac{119}{40}\end{matrix}\right.\)
