Răspuns:
[tex]\frac{x}{3}=\frac{y}{4}=\frac{z}{6}=\frac{7}{3}\\\\\frac{x}{3}=\frac{7}{3}=>x=7\\\\\frac{y}{4}=\frac{7}{3}=>y=\frac{28}{3}\\\\\frac{z}{6}=\frac{7}{3}=>z=14\\\\x+y+z=7+14+\frac{28}{3}=21+\frac{28}{3}=\frac{63+28}{3}=\frac{91}{3}[/tex]
Explicație pas cu pas:
