Tìm x biết \[\left( {x + \frac{1}{4} - \frac{1}{3}} \right):\left( {2 + \frac{1}{6} - \frac{1}{4}} \right) = \frac{7}\]

\[\left( {x + \frac{1}{4} - \frac{1}{3}} \right):\left( {2 + \frac{1}{6} - \frac{1}{4}} \right) = \frac{7}\]

\[\left( {x + \frac{1}{4} - \frac{1}{3}} \right):\frac = \frac{7}\]

\[x + \frac{1}{4} - \frac{1}{3} = \frac{7}.\frac\]

\[x + \frac{1}{4} - \frac{1}{3} = \frac{7}\]

\[x = \frac{7} - \frac{1}{4} + \frac{1}{3}\]

\[x = \frac{3}{8}\]

Đáp án cần chọn là: D