[tex]Zadanie\\\\a)\\\\\frac{x}{7}=\frac{5}{15}\\\\15x=35\ \ \mid:15\\\\x=\frac{35}{15} \\\\x= 2\frac{5}{15}\\\\x=2\frac{1}{3}\\\\\\b)\\\\\frac{4}{x}=\frac{6}{11}\\\\6x=44\ \ \mid:6\\\\x= \frac{44}{6}\\\\x=7\frac{2}{6}\\\\x=7\frac{1}{3}\\\\\\c)\\\\\frac{7}{8}=\frac{x}{6}\\\\ 8x= 42\ \ \mid:8\\\\x=\frac{42}{8}\\\\x=5\frac{2}{8}\\\\x=5\frac{1}{4}[/tex]
[tex]d)\\\\\frac{8}{9}= \frac{2}{x}\\\\8x=18\ \ \mid:8\\\\x=\frac{18}{8}\\\\x=2\frac{2}{8}\\\\ x=2\frac{1}{4}[/tex]
