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daca a+3=2xb=cx3=18 aflati msuma numerelor a,b si c

Răspuns :

a+3=2xb=cx3=18
18:3=6(c)
6:2=3(b)
3-3=0(a)
Proba: 0+3=2x3=6x3=18
a+b+c=?
0+3+6=9