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Aflati nr a , b si c stiind ca:
a/b=2/3


b/2=c/5


c-a=33

Dau coroana !


Răspuns :

a/b=2/3 => a=2b/3

b/2=c/5 => c=5b/2

c-a=33

5b/2 - 2b/3=33  ;   ·6

15b-4b=198

11b=198 => b=18

=> a=2·18/3; a=12

     b=5·18/2; b=45

R: a=12; b=18; c=45