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Ofer 20 de puncte !
Calculati raportul numerelor 3a+5b si 4a+7b, stiind ca a/b=2/3, (b≠0).


Răspuns :

Rezolvarea o gasiti in atas
Vezi imaginea ADRIANASIM
a/b = 2/3 => 2a = 3b => a=3b/2
3×3b/2+5b / 4x3b/2+7b = 9b/2+10b/2 / 12b/2+14b/2
19b/2 / 26b /2 = 19b/2 x 2/26b = 19/26