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Ex. 4!!! Am nevoie urgeeeent

Ex 4 Am Nevoie Urgeeeent class=

Răspuns :

4. P= 2*L+2*l=76
L=3l-2
2*(3l-2)+2l=76
6l-4+2*l=76
8l=76+4
8l=80
l=10
L=3l-2
L=3*10-2
L=30-2
L=28
Succes !