Răspuns :
a + b = 98
a - b = 82
a = 82 + b
82 + b + b = 98
2b = 98 - 82
2b = 16
b = 16 : 2
b = 8
a = 82 + 8 = 90
90 + 8 = 98
90 - 8 = 82
a |-----|
}98
b |-----|+82
98-82=16
a=16:2=8
b=8+82=90
Verificare: 8+90=98
90-8=82
}98
b |-----|+82
98-82=16
a=16:2=8
b=8+82=90
Verificare: 8+90=98
90-8=82