Tìm x: x+2/3 - 3/5 - ( - 1/6)

* Hướng dẫn giải

$$\begin{gathered} x+\frac{2}{3}=\frac{3}{5}-\left(-\frac{1}{6}\right) \\ \begin{array}{l}x+\frac{2}{3}=\frac{3}{5}+\frac{1}{6}\\ x+\frac{2}{3}=\frac{23}{30}\\ x=\frac{23}{30}-\frac{2}{3}\\ \begin{array}{l}x=\frac{23-20}{30}\\ x=\frac{1}{10}\end{array}\end{array} \end{gathered}$$