У+2 11/52 равно 7 5/39
Y+ 2 11/52 = 7 5/39 y=7 5/39 - 2 11/52 y= 6 44/39 - 2 11/52 y= (6-2) (44/39-11/52) y=4 44*4-11*3/156 y= 4 176-33/156 y=4 143/156