[tex] \it \frac{x}{5} = \frac{7}{2} = = > x = \frac{5 \cdot 7}{2} = = > x = \frac{35}{2} = = > x = 17,5 \\ \\ \it \frac{4}{x} = \frac{9}{5} = = > x = \frac{4 \cdot 5}{9} = = > x = \frac{20}{9} = = > x = 2,(2) \\ \\ \it \frac{11}{5} = \frac{x}{10} = = > x = \frac{11 \cdot 10}{5} = = > x = \frac{110}{5} = = > x = 22[/tex]
