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Xeryqnes
a fost răspuns

Aflati x:
6x(5x+2)=12x


Răspuns :

30x^2+12x=12x=>30x^2+12x-12x=0=>30x^2=0=>x^2=0=>x=0
30x+12x=12x
30x+12x-12x=0
30x=0
x=0/30
x=0