Răspuns:
a+b+c= 1 300
[tex] \frac{a}{2} = \frac{b}{3} = \frac{c}{4} = k[/tex]
[tex]a = 2k \\ b = 3k \\ c = 4k[/tex]
[tex]9 \times k = 1300 = > k = \frac{1300}{9} [/tex]
[tex]a = 2 \times \frac{1300}{9} [/tex]
[tex]b = 3 \times \frac{1300}{9} [/tex]
[tex]c = 4 \times \frac{1300}{9} [/tex]
