x+y=?
x,y=o cifra
x,1y+1,xy=4,44
x1y/100 + 1xy/100 = 444/100
=> x1y+1xy=444
100*x+10+y+100+10*x+y=444
110*x+2*y=444-110
110*x+2*y=334
55*x+y=167
c.1.
x=2
55*2+y=167
110+y=167 (Fals)
y=57
c.2.
x=3
55*3+y=167
165+y=167
y=2 (Adevarat)
=> x+y=3+2=5
x=3
y=2
(Daca x=4 o sa fie mai mare decât 167)
