Пропорция 7 1/3:1 5/6=0.6x:0.75
7 1/3:1 5/6=0.6x:0.75 22/3:11/6=0.6x:0.75 22/3*6/11=0.6x:0.75 4=0.6x:0.75|*0.75 0.6x=3 x=5