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\(C=\left(\frac{3}{5}-\frac{4}{15}\right).\left(\frac{2}{7}-\frac{3}{14}\right)-\left(\frac{5}{9}-\frac{7}{27}\right).\left(1-\frac{3}{5}\right)+\left(1-\frac{11}{12}\right).\left(1+\frac{1}{12}\right)\)
\(C=\left(\frac{9}{15}-\frac{4}{15}\right).\left(\frac{4}{14}-\frac{3}{14}\right)-\left(\frac{15}{27}-\frac{7}{27}\right).\left(\frac{5}{5}-\frac{3}{5}\right)+\left(\frac{12}{12}-\frac{11}{12}\right).\left(\frac{12}{12}+\frac{1}{12}\right)\)
\(C=\frac{5}{15}.\frac{1}{14}.\frac{8}{27}.\frac{2}{5}.\frac{1}{12}.\frac{13}{12}\)
\(C=\frac{5.1.8.2.1.13}{15.14.27.5.12.12}\)
\(C=\frac{5.2.4.2.13}{3.5.14.27.5.4.3.2.2.3}\)
\(C=\frac{13}{3.14.27.5.3.3}\)
\(C=\frac{13}{51030}\)
giup toi
\(\frac{3}{4}x-14\frac{2}{3}:\left(\frac{11}{15}+\frac{1111}{3535}+\frac{111111}{636363}\right)=12\)
\(\frac{3}{4}x-\frac{44}{3}:\left(\frac{11}{15}+\frac{11}{35}+\frac{11}{63}\right)=12\)
\(\frac{3}{4}x-\frac{44}{3}:\frac{11}{9}=12\)
\(\frac{3}{4}x-12=12\)
\(\frac{3}{4}x=12+12\)
\(\frac{3}{4}x=24\)
\(x=24:\frac{3}{4}\)
\(x=32\)
vậy \(x=32\)