Răspuns:
Explicație pas cu pas:
[tex]\frac{a}{6} =\frac{b}{7} =\frac{a+b}{6+7} =\frac{240}{13} \\ \\ \frac{a}{6} =\frac{240}{13}\\ \\ a=\frac{240\cdot6}{13} =\frac{1440}{13} \\ \\ \frac{b}{7} =\frac{240}{13}\\ \\ b=\frac{240\cdot 7}{13} =\frac{1680}{13}[/tex]
