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Biologista2000
a fost răspuns

Numerele a,b,c sunt astfel incat {a,b} d. p. {3,5} {b,c} i.p. {3,4}. Aflati a,b,c daca 2a+3b+4c=108

Răspuns :

a/3=b/5=k
a=3k
b=5k
b/1/3=c/1/4
b/4=c/3
5k/4=c/3
15k/4=c
2×3k+3×5k+15k=108
36k=108
k=3
a=9
b=15
c=45/4

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