Răspuns :
Fie x si y nr.
x+y=175
x-y=35
______(+)
2x / = 210 => x=105
Inlocuim x gasit in prima ecuatie
105+y=175
y=70
Proba: 105+70=175
105-70=35
Fie x si y nr.
x+y=175
x-y=35
______(+)
2x / = 210 => x=105
Inlocuim x gasit in prima ecuatie
105+y=175
y=70
Proba: 105+70=175
105-70=35