{111-[408:(x-5)+206]:3}×9=239-32
{111-[408:(x-5)+206]:3}×9=207
111-[408:(x-5)+206]:3=207:9
111-[408:(x-5)+206]:3=23
111-408:(x-5)+206=23×3
111-408:(x-5)+206=69
111-408:(x-5)=69-206
111-408:(x-5)= -137
408:(x-5)=111-(-137)
408:(x-5)=248
x-5=408:248
x-5=1.64
x=1.64+5
x=5.64