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  • Utilizator Brainly
2014-09-26T17:54:15+03:00
(a+b+c):3=66
a+b+c=198
b=2a
c=b-12=2a-12

a+2a+2a-12=198
5a=210
a=42
b=2*42=84
c=84-12=72

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