Mohon bantuannya kak...

1/(⁸¹log x) - 1/(²²⁵ log x) + 1/(⁶²⁵log x) = 2
ˣlog 81 - ˣlog 225 + ˣlog 625 = 2
ˣlog (81/225 . 625) = 2
ˣlog 225 = 2
x² = 225
x = √225
x = 15