Răspuns :
a=305
b=c:4 rezulta ca c=4b
305+b+4b=720
5b=720-305
5b=415
b=415:5
b=83
c=83x4
c=332
proba
b=c:4
b=332:4=83
305+83+332=720
b=c:4 rezulta ca c=4b
305+b+4b=720
5b=720-305
5b=415
b=415:5
b=83
c=83x4
c=332
proba
b=c:4
b=332:4=83
305+83+332=720