{a,b,c} d.p. { 3,5,7}
[tex] \frac{a}{3} = \frac{b}{5} = \frac{c}{7} = k[/tex]
a=3k→ a=3x5=15
b=5k→ b=5x5=25
c=7k→ c=7x5=35
Inlocuim in a+b+c=75
3k+5k+7k=75
15k=75→ k=5
Sper ca te am ajutat!
