Odredi sva realna rješenja sustava jednadžbi xy4y−3x=20,\frac{xy}{4y - 3x} = 20,4y−3xxy=20, xz2x−3z=15,\frac{xz}{2x - 3z} = 15,2x−3zxz=15, zy4y−5z=12.\frac{zy}{4y - 5z} = 12.4y−5zzy=12.