Răspunsuri

2014-05-20T20:58:39+03:00
A+v=67
a-7=v/2
a=v/2 +7

v/2 +7 +v=67

v/2 +v=67-7
v/2 +v=60  aducem la acelasi numitor
v+2v=120
3v=120
v=40
a=40/2+7= 20+7=27