\(=\left(16\frac{2}{7}-28\frac{2}{7}\right):\left(-\frac{3}{5}\right)\)
\(=-12\div\left(-\frac{3}{5}\right)=20\)
\(16\frac{2}{7}:\left(\frac{-3}{5}\right)-28\frac{2}{7}:\left(\frac{-3}{5}\right)\)
\(=16\frac{2}{7}.\left(\frac{-5}{3}\right)-28\frac{2}{7}.\left(\frac{-5}{3}\right)\)
\(=\left(16\frac{2}{7}-28\frac{2}{7}\right).\left(\frac{-5}{3}\right)\)
\(=\left(-12\right).\left(\frac{-5}{3}\right)\)\(=20\)
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