7 целых 1 3-я : 1 целую 5 6-ых = 0,6х : 0,75
7 1/3:1 5/6=0.6х:0.75 22/3:11/6=0.6х:0.75 4=0.6х:0.75 0.6х=0.75х4 0.6х=3 х=3:0.6 х=5