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a/b=3/7 calculati 3a+8b/8b Urgent!!! Ofer coroana si 99 de puncte

Răspuns :

[tex]\frac{a}{b}=\frac{3}{7}\Rightarrow \frac{a}{3}=\frac{b}{7}=k\Rightarrow a=3k,b=7k\\ \frac{3a+8b}{8b}=\frac{9k+56k}{56k}=\frac{65k}{56k}=\boxed{\boxed{\frac{65}{56}}}[/tex]