a) \(\dfrac{x}{27}=\dfrac{-2}{3,6}\)
\(\Leftrightarrow x.3,6=27.-2\)
\(\Leftrightarrow x.3,6=-54\)
\(\Leftrightarrow x=\dfrac{-54}{3,6}=-15\)
b) \(-0,52:x=-9,36:16,38\)
\(\Leftrightarrow-0,52.16,38=x.-9,36\)
\(\Leftrightarrow-8,5176=x.-9,36\)
\(\Leftrightarrow x=\dfrac{-8,5176}{-9,36}=\dfrac{91}{100}=0,91\)