1/3x+y-1/3x-y=3x-y-(3x+y)/y²-9=-2y/y²-9
013, 015,031, 051, 053, 035
103, 105, 130, 150, 135, 153
301, 305, 310, 350, 351, 315
501, 503, 530, 510, 531, 513
24 числа.