vă rooog problema 6!!!! E urgent

Răspuns:
a:b=3
c:a=2
c-b=45
2b+a+3c
rezolvare
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