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Folosind amplificari convenbile,gasiti x€N,astfel incat:
a)4 supra 3=x supra 30
b)9 supra x =3 supra 7
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Dau puncte!!
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Răspuns :



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!