Răspuns :
SE STIE CA:
A+B+C=23
B=2A
C=B-3
inlocuim B si C in ecuatie si obtinem: A+2A+2A-3=23
5A-3=23
5A=26
A=26/5
B=26/5*2=52/5
C=52/5-3=37/5
A+B+C=23
B=2A
C=B-3
inlocuim B si C in ecuatie si obtinem: A+2A+2A-3=23
5A-3=23
5A=26
A=26/5
B=26/5*2=52/5
C=52/5-3=37/5