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2014-06-12T22:52:43+03:00
Perimetrul= 2x suma ⇒

⇒suma=  \frac{perimetru}{2} = \frac{342}{2}

=171
x=latimea
x+1=lungimea
x+x+1=171
2x+1=171
2x=171-1
2x=170
x=170:2
x=85(latimea)
85+1=86(lungimea)