x/(5/6)+1/5=4/5
6x/5=3/5
x=1/2能不能详细一点，谢谢x/(5/6)+1/5=4/56x/5=4/5-1/56x/5=3/5x=(3/5)/(6/5)=(3/5)*(5/6)=3/6=1/2