Răspuns :

Xaphalid

[tex]\frac{a}{4}=\frac{b}{7}=\frac{c}{14} =k\\\frac{a}{4}=k => a=4k\\\frac{b}{7} =k => b=7k\\\frac{c}{14} =k=>c=14k\\ a+b+c=4k+7k+14k=25k\\[/tex]

[tex]25k=75=>k=\frac{75}{25} =3[/tex]

[tex]a=4*3=12\\b=7*3=21\\c=14*3=42[/tex]

Răspuns:

Explicație pas cu pas:

a/4=b/7=c/14=(a+b+c)/(4+7+14)=75/25=3

a/4=3      a=12

b/7=3      b=21

c/14=3     c=42

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