\(\dfrac{3}{x}=2:\dfrac{9}{10}\Rightarrow\dfrac{3}{x}=\dfrac{20}{9}\Rightarrow x=3:\dfrac{20}{9}=\dfrac{27}{20}\)
\(\dfrac{-2}{\dfrac{3}{x}}=\dfrac{9}{10}\Leftrightarrow x=\dfrac{-2}{3}:\dfrac{9}{10}\Leftrightarrow x=\dfrac{-20}{27}\)
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