Question

determinatibnr naturale x si y astfel incat (x+3)×(y-2)=18

Answer 1

(x+3)(y-2)=18=1x18=2x9=3x6=6x3=9x2=18x1
x+3=1, x=-2∉N
x+3=2, x=-1∉N
x+3=3, x=0, y-2=6, y=8  
x+3=6, x=3, y-2=3, y=5
x+3=9, x=6, y-2=2, y=4
x+3=18, x=15, y-2=1, y=3