(5/6-3/8):3/4-(3/8+7/20):1 9/20 решите

[latex](frac{5}{6}-frac{3}{8}):frac{3}{4}-(frac{3}{8}+frac{7}{20}):1frac{9}{20}[/latex] = [latex](frac{20}{24}-frac{9}{24}):frac{3}{4}-(frac{15}{40}+frac{14}{40}):frac{29}{20}[/latex] = [latex]frac{11}{24}:frac{3}{4}-frac{29}{40}:frac{29}{20}[/latex] = [latex]frac{11}{24}*frac{4}{3}-frac{29}{40}*frac{20}{29}[/latex] = [latex]frac{11}{18}-frac{1}{2}[/latex] = [latex]frac{11}{18}-frac{9}{18}[/latex] = [latex]frac{2}{18}[/latex] = [latex]frac{1}{9}[/latex]