Răspuns :
a+b=10
a-b=2=>a=b+2
b+2+b=10
b+b+2=10
2b=10-2
2b=8
b=8:2
b=4
a=b+2
a=4+2=6
a-b=2=>a=b+2
b+2+b=10
b+b+2=10
2b=10-2
2b=8
b=8:2
b=4
a=b+2
a=4+2=6
x + y = 10 si x - y = 2 pentru x > y !
x = (10+2) / 2 = 6
si y =(10 - 2) / 2 = 4
x = (10+2) / 2 = 6
si y =(10 - 2) / 2 = 4