Răspuns :
a+b=75
a-b=61=>a=b+61
a,b=?
a I-----I--61--I
b I-----I
b=(75-61):2
b=14:2
b=7
a=b+61
a=7+61
a=68
Verificare:
a+b=75
68+7=75
a-b=61=>a=b+61
a,b=?
a I-----I--61--I
b I-----I
b=(75-61):2
b=14:2
b=7
a=b+61
a=7+61
a=68
Verificare:
a+b=75
68+7=75