a) \(x.3\frac{1}{4}+\left(\frac{-7}{6}\right).x-1\frac{2}{3}=\frac{5}{12}\)
\(x.\left(3\frac{1}{3}+\frac{-7}{6}\right)-1\frac{2}{3}=\frac{5}{12}\)
\(x.\frac{13}{6}-1\frac{2}{3}=\frac{5}{12}\)
\(x.\frac{13}{6}=\frac{5}{12}+1\frac{2}{3}\)
\(x.\frac{13}{6}=\frac{25}{12}\)
\(x=\frac{25}{12}:\frac{13}{6}\)
b) \(5\frac{8}{17}:x+\left(\frac{-4}{17}\right):x+3\frac{1}{7}:17\frac{1}{3}=\frac{4}{11}\)
\(\left(5\frac{8}{17}+\frac{-4}{17}\right):x+\frac{33}{182}=\frac{4}{11}\)
\(\left(5\frac{8}{17}+\frac{-4}{17}\right):x=\frac{4}{11}-\frac{33}{182}\)
\(\left(5\frac{8}{17}+\frac{-4}{17}\right):x=\frac{365}{2002}\)
\(\frac{89}{17}:x=\frac{365}{2002}\)
\(x=\frac{89}{17}:\frac{365}{2002}\)
\(x=\frac{178178}{6205}\)