Răspuns :
Notam nr cu x si y
x-y=110
x=7y-16
7y-16-y=110
6y-16=110
6y=110+16
6y=126
y=126:6
y=21, deci x=110+21=131
x-y=110
x=7y-16
7y-16-y=110
6y-16=110
6y=110+16
6y=126
y=126:6
y=21, deci x=110+21=131