Đáp án đúng: B
Giải chi tiết:\(\begin{array}{l}\,\,\,\,9 \times \left( {x - 2} \right) = 27\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,x - 2\,\,\, = 27:9\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,x - 2\,\,\, = \,3\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\, = 3 + 2\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\, = 5\end{array}\)
Chọn B