Răspunsuri

2014-05-10T13:25:49+03:00
P=2L+2l
2(x+1)+2(x-1)=14
2x+2+2x-2=14
4x=14
x=14:4
x=3,5
L=x+1
L=4,5
l=x-1
l=2,5
1 5 1