Răspuns :
E+D+L=482
D=E+27=>E=D-27
D=L-83=>L=D+83
D-27+D+D+83=482
3D=482+27-83
D=426:3
D=142 puncte a obtinut Diana
E=142-27=115 puncte a obtinut Edi
L=142+83=225 puncte a obtinut Luca
verificare 142+115+225=482 puncte
D=E+27=>E=D-27
D=L-83=>L=D+83
D-27+D+D+83=482
3D=482+27-83
D=426:3
D=142 puncte a obtinut Diana
E=142-27=115 puncte a obtinut Edi
L=142+83=225 puncte a obtinut Luca
verificare 142+115+225=482 puncte
Edi=a; Diana=b; Luca=c
sti ca a+b+c=482 puncte
b=27+a
b=c-83 , c=b+83=27+a+83=110+a
a+27+a+110+a=482
3a+137=482; 3a=482-137; 3a=345; a=345:3; a=115
b=27+115; b=142
c=110+115; c=225
R________Edi are 115 puncte, Diana are 142 pc., Luca are 225 puncte
sti ca a+b+c=482 puncte
b=27+a
b=c-83 , c=b+83=27+a+83=110+a
a+27+a+110+a=482
3a+137=482; 3a=482-137; 3a=345; a=345:3; a=115
b=27+115; b=142
c=110+115; c=225
R________Edi are 115 puncte, Diana are 142 pc., Luca are 225 puncte