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Aflati a,b,c stiind ca {a,b,c} d.p {2,3,5} si a+b+c=20

Răspuns :

a/2= b/3=c/5= k
a= 2k
b=3k
c=5k
a+b+c= 20
2k+3k+5k=20
10k=20 / :10
k= 20: 10
k=2

a= 2* 2=4
b= 3* 2=6
c= 5* 2=10             Sper ca e bine :D