Răspuns :
a+b=98
a=2b+17
a=?
b=?
2b+17+b=98
3b=98-17
3b=81
b=27
a=2b+17
a=27×2+17
a=54+17
a=71
verificare: 71+27=98 => Adevarat
a=2b+17
a=?
b=?
2b+17+b=98
3b=98-17
3b=81
b=27
a=2b+17
a=27×2+17
a=54+17
a=71
verificare: 71+27=98 => Adevarat