Tìm x: x-[17/2 - (-3/7 + 5/3)]=-1/3

* Hướng dẫn giải

$\begin{array}{l}x-\left[\frac{17}{2}-\left(\frac{-3}{7}+\frac{5}{3}\right)\right]=\frac{-1}{3}\\ \begin{array}{l}x-\left(\frac{17}{2}+\frac{3}{7}-\frac{5}{3}\right)=\frac{-1}{3}\\ x-\left(\frac{357}{42}+\frac{18}{42}-\frac{70}{42}\right)=\frac{-1}{3}\\ x-\frac{305}{42}=\frac{-1}{3}\\ x = \frac{-1}{3}+\frac{305}{42}\\ x=\frac{-14}{42}+\frac{305}{42}\\ x=\frac{291}{42}=\frac{97}{14}\end{array}\end{array}$