Răspuns :
d=199-3=196
d=2xc c=d/2 c=196/2 c=98
c=2xb b=c/2 b=98/2 b=49
b=7xa a=b/7 a=49/7 a=7
a=7 b=49 c=98 d=196
cu placere
d=2xc c=d/2 c=196/2 c=98
c=2xb b=c/2 b=98/2 b=49
b=7xa a=b/7 a=49/7 a=7
a=7 b=49 c=98 d=196
cu placere