1/3 [1/4 (x+1/5 -1)-6]+x=2
[1/4 (x+1/5 -1)-6]+3x=2x3=6
即1/4(x+1/5 -1)+3x=6+6=12
同X4,得,x+1/5 -1+12x=12x4=48
13X=48+1-1/5
同x5,得,65x=49x5-1=244
x=244/65