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+b
a=82+8
a=90
a-b=82
a=82+b
82+b+b=98
2b=98-82
2b=16
b=16:2
b=8
a=82+b
a=82+8
a=90
a+b =98 -
a-b =82
----------------------
/ 2b =16
b =8
a+8 =98
a =98-8
a =90