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

у+2 11/52=7 5/39
у=7 5/39-2 11/52
у=4 11/12



7 5/39-2 11/52=7-2+260/2028-429/2028=5-169/2028=5-1/12=4+12/12-1/12=
4+11/12=4 11/12