Explicație pas cu pas:
(x-3)/(x+2)€Z <=> x+2|x-3
x+2|x-3
x+2|x+2
=> x+2|x+2-x+3 => x+2|5 =>x+2€D5 in Z =>
x+2€{-5,-1,1,5} =>
x€{-7,-3,-1,3}