Question

x－2分之1[x－2分之1（x－2分之1） ]等于2 怎么解

Answer 1

2=x-1/2(x-(1/2x-1/4))

2 =x-1/2(x-1/2x+1/4)

2 =x-1/2(1/2x+1/4)

2 =x-(1/4x+1/8)

2 =3/4x-1/8

17/8=3/4x

x=17/6