Tìm giá trị của x biết: \(\frac{1}{2} + 2x = \frac{5}{6}:\frac{2}{3}.\)

* Hướng dẫn giải

\(\begin{array}{l}\,\frac{1}{2} + 2x = \frac{5}{4}\\\,\,\,\,\,\,\,\,\,\,\,\,\,2x = \frac{5}{4} - \frac{1}{2}\\\,\,\,\,\,\,\,\,\,\,\,\,\,2x = \frac{3}{4}\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = \frac{3}{4}:2\\\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,x = \frac{3}{8}\end{array}\)

Vậy \(x = \frac{3}{8}\)

Chọn C