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2014-03-24T22:19:50+02:00
P=2L+2l=92
L=2 l+7
92=2(2 l+7)+2l
92=4l+14+2l
6l=78
l=13
L=2*13+7
L=33
P=perimetrum,l=latime, L=lungime
2 3 2