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Daca a:b=3 c:a=2 si c-b=45 , calculeaza 2b+a+3c .

Răspuns :

a=3b
c=2a
b=c-45= 2a-45=6b-45
5b=45
b=9
a=27
c=54
2b+a+3c=18+27+162=45+162=207