Răspuns :
a+b+c=648
a=b+177
c=b
b+177+b+b=648
3b+177=648
3b=471
b=157
a=b+177
a=157+177
a=334
c=157
a=b+177
c=b
b+177+b+b=648
3b+177=648
3b=471
b=157
a=b+177
a=157+177
a=334
c=157
A+B+C=648,,A=B+177=C (B+177)+B+(B+177)=648 3B+177=648 3B=648-177=471 B=471:3=157 B=157 B=C=157 A=157+177=334 334+157+157=648