Identify the pairs of like and unlike terms:

(i) (-3)/2x, y

(ii) -x, 3x

(iii) (-1)/2y2x, 3/2xy²

(iv) 1000, -2

(i) (-3)/2x, y → Unlike Terms

(ii) -x, 3x → Like Terms

(iii) (-1)/2y2x, 3/2xy² → Like Terms

(iv) 1000, -2 → Like Terms