Fie a= nr nucilor detinute de Ionek
b= nr nucilor detinute de Aurel
a+b=388 => (scriem una in functie se alta) a=388-b
a+73=b-25
(Acum inlocuim)
388-b+73=b-25|+b
388+73=b+b-25
461=2b-25|+25
486=2b|:2
=> b=243 nuci
=>a=388-243
=>a=145 nuci
R: Ionek are 145 nuci
Si
Aurel are 243 nuci