Cześć ;-)
[tex](7\frac{1}{4}-2\frac{1}{6}):2\frac{13}{24}=(7\frac{6}{24}-2\frac{4}{24}):2\frac{13}{24}=\\\\=5\frac{2}{24}:2\frac{13}{24}=5\frac{1}{12}:2\frac{13}{24}=\frac{61}{12}:\frac{61}{24}=\\\\=\frac{61}{12}\cdot\frac{24}{61}=\frac{24}{12}=\boxed2[/tex]
Pozdrawiam! ~ JulkaOdMatmy