Răspuns :
10/(x-1)x(y+1)=1
(x-1)x(y+1)=10=1*2*5, x-1=1, x=2, y+1=5, adica x=2 si y=4
6/(x+1)x(y+2)=1
(x+1)x(y+2)=6=3*2*1, x+1=3, x=2, y+2=1, adica x=2, y=-1, nu e solutie (y nu e natural)
(x+1)x(y+2)=6=2*1*3, x+1=2, x=1, y+2=3, adica x=1, y=1
(x-1)x(y+1)=10=1*2*5, x-1=1, x=2, y+1=5, adica x=2 si y=4
6/(x+1)x(y+2)=1
(x+1)x(y+2)=6=3*2*1, x+1=3, x=2, y+2=1, adica x=2, y=-1, nu e solutie (y nu e natural)
(x+1)x(y+2)=6=2*1*3, x+1=2, x=1, y+2=3, adica x=1, y=1