Đáp án đúng: C
Giải chi tiết:\(\begin{array}{l}\,\,\,\,x:6 - 1290 = 2314\\\,\,\,\,\,x:6\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 2314 + 1290\\\,\,\,\,\,x:6\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 3604\\\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 3604 \times 6\\\,\,\,\,\,x\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, = 21624\end{array}\)
Vậy \(x = 21624\)
Chọn C