\(1\frac{1}{12}:\left(\frac{1}{3}-\frac{1}{4}\right)-\frac{2}{x}=\frac{2}{5}:\left(\frac{1}{2}-\frac{1}{5}\right)\)
\(\frac{13}{12}:\frac{1}{12}-\frac{2}{x}=\frac{2}{5}:\frac{3}{10}\)
\(13-\frac{2}{x}=\frac{4}{3}\)
\(\frac{2}{x}=\frac{35}{3}\)
\(6=35x\)
\(x=\frac{6}{35}\)