\(x:4\frac{1}{3}=-2,5\) \(x:\frac{-3}{5}=\frac{-10}{21}\)
\(\Rightarrow x:\frac{13}{3}=\frac{-25}{10}\) \(\Rightarrow x=\frac{-10}{21}.\frac{-3}{5}\)
\(\Rightarrow x=\frac{-5}{2}.\frac{13}{3}\) \(\Rightarrow x=\frac{2}{7}\)
\(\Rightarrow x=\frac{-65}{6}\)
c)\(\frac{2}{3}x-\frac{1}{2}=\frac{1}{10}\) \(\frac{1}{2}x+\frac{1}{2}=\frac{5}{2}\)
\(\Rightarrow\frac{2}{3}x=\frac{1}{10}+\frac{1}{2}\) \(\Rightarrow\frac{1}{2}x=\frac{5}{2}-\frac{1}{2}\)
\(\Rightarrow\frac{2}{3}x=\frac{1}{10}+\frac{5}{10}\) \(\Rightarrow\frac{1}{2}x=\frac{4}{2}\)
\(\Rightarrow\frac{2}{3}x=\frac{6}{10}\) \(\Rightarrow x=\frac{4}{2}:\frac{1}{2}\Rightarrow2.2=4\)
\(\Rightarrow x=\frac{6}{10}:\frac{2}{3}\Rightarrow\frac{3}{5}.\frac{3}{2}=\frac{9}{10}\)