\(C=\dfrac{-5}{7}.\dfrac{2}{11}+\dfrac{-5}{7}.\dfrac{9}{11}+1\dfrac{5}{7}\)
\(C=\dfrac{-5}{7}.\left(\dfrac{2}{11}+\dfrac{9}{11}\right)+\dfrac{5}{7}.1\)
\(C=\dfrac{5}{7}.1+1.\dfrac{5}{7}\)
\(C=1.\left(\dfrac{-5}{7}+\dfrac{5}{7}\right)\)
\(C=1.0\)
\(C=0\)
\(D=0,7.2\dfrac{2}{3}.20.0,375.\dfrac{5}{28}\)
\(D=\dfrac{7}{10}.\dfrac{8}{3}.20.\dfrac{3}{8}.\dfrac{5}{28}\)
\(D=\dfrac{7}{10}.20.\dfrac{5}{28}\)
\(D=7.2.\dfrac{5}{28}\)
\(D=2.\dfrac{5}{28}\)
\(D=\dfrac{5}{2}\)
\(E=0\)
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