Răspuns:
[tex]\frac{L}{3} = \frac{l}{2} +84[/tex] [tex]\frac{L}{3} = 8+l[/tex] => (le egalam )
8+l=[tex]\frac{l}{2} +84[/tex] l-[tex]\frac{l}{2}[/tex]= 84-8 (aducem la acelasi numitor)
2l-l = 2*76 l= 152 m (latimea)
[tex]\frac{L}{3}[/tex]= 152+8=160 L= 3*160= 480m (lungimea)
Verif : 480 :3= 152:2 +84
160=76+84