1/9{1/7[1/5(x+2/3+4)+6]+8}=1
1/7[1/5(x+2/3+4)+6]+8=9
1/7[1/5(x+2/3+4)+6]=1
1/5(x+2/3+4)+6=7
1/5(x+2/3+4)=1
(x+2/3+4)=5
(x+2)/3=1
x+2=3
x=1
1/9{1/7[1/5(x+2/3+4)+6]+8}=1
1/7[1/5(x+2/3+4)+6]+8=9
1/7[1/5(x+2/3+4)+6]=1
1/5(x+2/3+4)+6=7
1/5(x+2/3+4)=1
(x+2/3+4)=5
(x+2)/3=1
x+2=3
x=1