Răspuns :
a +b=98
a-b=46; a= 46+b
46+b+b=98
2b=98-46
2b=52
b= 26
a=26+46
a=72
Verificare
72+26=98
72-26=46
a-b=46; a= 46+b
46+b+b=98
2b=98-46
2b=52
b= 26
a=26+46
a=72
Verificare
72+26=98
72-26=46