a) [tex] \frac{4}{3} = \frac{x}{30} =\ \textgreater \ x= \frac{30*4}{3} =\ \textgreater \ x=10*4=\ \textgreater \ x=40[/tex]
b)
[tex] \frac{9}{x} = \frac{3}{7} =\ \textgreater \ x= \frac{9*7}{3} =\ \textgreater \ x=3*7=\ \textgreater \ x=21[/tex]
Spor!