1 1/4х+3 1/3-(5 1/6+1/2х)=1 1/2
5/4х+10/3-31/6-1/2х=3/2 5/4х-1/2х=3/2+31/6-10/3 3/4х=20/6 х=20/6:3/4 х=40/9=4 4/9