Here lets assume m1 = 6kg and the corresponding position vector be r1=6i-7j and for m2 = 2 kg and corresponding position vector r2=2i+10j.

Now CM = m1r1+m2r2/(m1+m2)=(20/7) i - (11/7) j

Thus the center of mass will be located in the coordinate (20/7,-11/7)

I hope this answer helps. All the very best for your future endeavors!