упростите выражение 9,4х+(2х-11 3/4у)-3 5/9у

9,4х+(2х-11 3/4у)-3 5/9у= 9,4х+2х-11 3/4y-3 5/9y= 11,4x-11 27/36y-3 20/36y= 11,4x-14 47/36y= 11,4x-15 11/36y