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2014-04-13T10:42:54+03:00
A+v=67
a=v/2+7  aducem la acelasi numitor
a=v+14/2

v+14/2  +v=67 aducem la acelasi numitor
v+14+2v=134
3v=134-14
3v=120
v=40     a=40/2 +7=20+7=27
3 4 3
2014-04-13T10:43:45+03:00