Răspuns :
a+b+c=589
a+b=468
c=589-468
c=121
b=c+122
b=121+122
b=243
a=589-(121+243)
a=589-364
a=225
Fie a,b,c cei 3 termeni
a+b+c=589
a+b=468
c=b-122=> b=122+c
a+b+c=589
468+c=589=>c=121
b=122+c=>b=122+121=243
a=468-243=225
a+b+c=589
a+b=468
c=b-122=> b=122+c
a+b+c=589
468+c=589=>c=121
b=122+c=>b=122+121=243
a=468-243=225