Răspunsuri

2014-03-16T13:36:15+02:00
720-s=r(r=s-136)720=s+r
720=s+s-136
2s=720+136
s=428
r=428-136
verif.720-428=428-136
2014-03-16T14:49:13+02:00
D-S=r       (1)
r=S-136    (2)
Inlocuiesc (2) in 1 si D=720
720-S=S-136 ⇒ 720+136= 856=2S
S= 856:2=428
r=428-136=292