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(a,b,c) d. p (3,7,9 )
a+b+c--38


Răspuns :

a , b , c d.p cu 3 , 7 , 9
=>
[tex] \frac{a}{3} = \frac{b}{7} = \frac{c}{9} = k \\ = > a = 3k \: \: b = 7k \: \: c = 9k[/tex]
Acum inlocuiesti in suma:
[tex]3k + 7k + 9k = 38 \\ 19k = 38 \\ k = 2[/tex]
Si acum afli a b c:

a = 3k = 6
b = 7k = 14
c = 9k = 18