Răspunsuri

2014-09-02T13:21:39+03:00
L+l=240,L=l+20, L=? , l=?
L=l+20 => l+20+l=240; 2l+20=240 ; 2l=240-20, 2l=220=> l=110
L=l+20; L=110+20=> L=130