Răspuns :
a+ b=304
a- b=304:8=38
a= b+38
b /___/ }304
a /___/+38
b=(304-38):2=133
a = 133+38=171
verificare 171+133=304
a+b=304
a-b=304:8
a-b=38
a=3+b
38+b+b=304
38+2b=304
2b=304-38
2b=266
b=266:2
b=133
a+133=304
a=304-133
a=171
proba
a+b=171+133=304
a-b=171-133=38
a-b=304:8
a-b=38
a=3+b
38+b+b=304
38+2b=304
2b=304-38
2b=266
b=266:2
b=133
a+133=304
a=304-133
a=171
proba
a+b=171+133=304
a-b=171-133=38