[latex]40-2frac{4}{7}:left[-0,12+left(-frac{3}{4} ight):12,5 ight]cdot(-1,4)=[/latex] [latex]40-2frac{4}{7}:left[-frac{12}{100}+left(-frac{3}{4} ight):frac{125}{10} ight]cdotleft(- frac{14}{10} ight)=[/latex] [latex]40-2frac{4}{7}:left[-frac{3}{25}+left(-frac{3}{4} ight)cdot frac{10}{125} ight]cdotleft(- frac{7}{5} ight)=[/latex] [latex]40-2frac{4}{7}:left[-frac{3}{25}-frac{3}{50} ight]cdotleft(- frac{7}{5} ight)=[/latex] [latex]40-2frac{4}{7}:left[-frac{6}{50}-frac{3}{50} ight]cdotleft(- frac{7}{5} ight)=[/latex] [latex]40-2frac{4}{7}:left(-frac{9}{50} ight)cdotleft(- frac{7}{5} ight)=[/latex] [latex]40-frac{18}{7}cdot left(-frac{50}{9} ight)cdotleft(- frac{7}{5} ight)=[/latex] [latex]40-20=20[/latex]
